Chevrolet Task Force Series
Camionette Chevrolet, Chevrolet Task Force
Overview
Manufacturer	Chevrolet (General Motors)
Also called	3100 3200 3600 31 50 100 Apache Cameo Carrier Suburban Carrier Viking Spartan
Production	1955–1960
Assembly	Van Nuys Assembly (Van Nuys, California) Flint Truck Assembly, Flint, Michigan St. Louis Truck Assembly (Saint Louis, Missouri) Pontiac Assembly Center (Pontiac, Michigan)
Body and chassis
Class	Pickup truck
Body style	2-door truck
Layout	Front engine, rear-wheel drive /four-wheel drive
Platform	GM A platform
Powertrain
Engine	235 cu in (3.9 L) I6 265 cu in (4.3 L) V8 283 cu in (4.6 L) V8
Transmission	3 or 4 speed manual Hydramatic
Dimensions
Wheelbase	114.0 in (2,896 mm) 123.0 in (3,124 mm)
Chronology
Predecessor	Chevrolet Advance Design
Successor	C/K Series

The Chevrolet Task Force is Chevrolet‘s successor to the Advance Design trucks. The Task Force Series ran from late 1955 (second series) through 1959. At GMC locations, it was called the Blue Chip Series.

The 1955 second series offered standard options and add-ons such as 12-volt electrical systems, the first V8 (the 265 cubic inch), and fleet-side six-, seven-, and eight-foot length beds.

Differences

Nineteen fifty-five second series – first year for new body style. New “wrap-around” windshield – a truck industry first – and optional wrap-around rear window on Deluxe cabs. Power steering and power brakes became available for the first time on GM trucks. Electrical system upgraded to 12 volts. Only year for seven-foot bed length. Fenders have single headlights and one-piece emblem is mounted below horizontal line on fender. Cameo Carrier series introduced.

1956 – wider hood emblem. Two-piece fender emblems are mounted above horizontal fender line. Last year for egg crate grille.

1957 – only year for more open grille. Hood is flatter with two spears on top, similar to the 1957 Bel Air. Fender emblems are still above fender line, but are now oval-shaped, as opposed to previous versions in script.

1958 – first year for fleetside bed, significant redesign of front end. All light-duty trucks are now called “Apaches”, medium-duty trucks called “Vikings”, and heavy-duty trucks called “Spartans”. Truck has four headlights instead of the previous two and features a shorter, wider grille running the width of the front end. Parking lights are now in the grille instead of being in the front of the fender and the hood is similar to 1955/1956 models, but with a flat “valley” in the middle. First year for factory-equipped air conditioning.

1959 – minimal changes from 1958, the most apparent was a larger and more ornate hood emblem and redesigned badging on the fenders. The last year that the NAPCO (Northwestern Auto Parts Company) “Powr-Pak” four-wheel drive conversion could be factory ordered.

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  1955 GMC Blue Chip 150

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  1955 Chevrolet Task Force

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  1956 Chevrolet 3100

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  1956 GMC Blue Chip

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  1957 GMC Suburban Carrier

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  1957 Chevrolet Task Force

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  1958 Chevrolet Apache

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  1958 GMC Suburban

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  1959 GMC 9310 pickup truck

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  1959 Chevrolet Apache

  Chevrolet C/K

  Main article: List of GM platforms

  Chevrolet C/K
  Overview
  Manufacturer	Chevrolet/GMC (General Motors)
  Also called	GMC C/K GMC Sierra
  Production	1960–2002 (United States) 1965–2002 (Canada) 1964–2001 (Brazil) 1975–1982 (Chile) 1960–1978/1986–1994 (ArgentinaSevel) 1999-2006 (South Korea, as a renamed Silverado)
  Body and chassis
  Class	Full-size pickup truck
  Body style	2-door regular cab 2-door extended cab 3-door extended cab 4-door crew cab
  Layout	Front engine, rear-wheel drive /four-wheel drive
  Chronology
  Predecessor	Task Force
  Successor	Chevrolet Silverado, Chevrolet Avalanche

  The C/K was Chevrolet and GMC‘s full-size pickup truck line from 1960 until 2002 in the United States, from 1965 to 2002 in Canada, from 1964 through 2001 in Brazil, and from 1975 to 1982 in Chile. The first Chevrolet pickup truck came out in 1924, though in-house designs did not appear until 1930. “C” indicated two-wheel drive and “K” indicated four-wheel drive. The aging C/K light-duty pickup truck was replaced with the Chevrolet Silverado and GMC Sierra names in 1999 in the US and Canada, and 2001 in Brazil; the Chevrolet Silverado HD and GMC Sierra HD heavy-duty pickup trucks followed. Until this time, the names Silverado and Sierra were used to identify the trim level of the C/K trucks.

  For the first Chevrolet C Series, made from 1911 to 1913, see Chevrolet Series C Classic Six, (the first Chevy).

  First generation 1960–1966

  

   1963 Chevrolet stepside

  First generation
  Overview
  Also called	C10/K10 C15/K15 C20/K20 C30
  Production	1960–1966
  Body and chassis
  Related	Chevrolet Suburban
  Powertrain
  Engine	230 in3 (3.8 L) I6 236 in3 (3.9 L) I6 250 in3 (4.1 L) I6 261 in3 (4.3 L) I6 292 in3 (4.8 L) I6 305 in3 (5.0 L) V6 283 in3 (4.6 L) V8 327 in3 (5.3 L) V8
  Transmission	3-speed synchromesh manual 4-speed synchromesh manual 2-speed Powerglide automatic
  Dimensions
  Wheelbase	115 in (2,921 mm) (short box) 127 in (3,226 mm) (long box) 133 in (3,378 mm) (1961–63 long box)
  Length	186.875 in (4,747 mm) SWB 206 in (5,232 mm) Standard 216.25 in (5,493 mm) LWB
  Width	78.75 in (2,000 mm)
  Height	71.25 in (1,810 mm)

  

   1966 Chevrolet C-10

  

   1962 Chevrolet C/K

  The 1960 model year introduced a new body style of light pick-up truck that featured many firsts. Most important of these were a drop-center ladder frame, allowing the cab to sit lower, and independent front suspension, giving an almost car-like ride in a truck. Also new for 1960 was a new designation system for trucks made by GM. Gone was the 3100, 3200, and 3600 designations for short 1/2, long 1/2 and 3/4-ton models. Instead, a new scheme would assign a 10, 20, or 30 for 1/2, 3/4, and 1-ton models. Since 1957, trucks were available from the factory as 4-wheel drive, and the new class scheme would make this known. A C (Conventional) in front of the series number would indicate 2-wheel rear drive while a K would denote 4-wheel drive. Actual badging on trucks still carried the series name system from the previous generation. The cab roof used double walled steel construction unlike the other automakers who used a single steel roof. The 10, 20, 30, and 40 series (C or K) were badged as “Apache”, etc. 50, and 60 series trucks were badged as “Viking”, and the largest 70, 80, and 90 series models were marked “Spartan” etc. In 1960, C/K trucks were available in smooth “Fleetside” or fendered “Stepside” versions. GMC called these “Wideside” and “Fenderside.” Half-ton models were the C10 and K10 long-bed and short-bed trucks, and The 3/4-ton C20 and K20, as well as the one-ton C30, were also available. GMC did not use the “C” nomenclature, though their 4×4 versions had the “K” designation. GMC Model numbers for 1/2, 3/4, 1, and 1.5 ton were 1000, 1500, 2500, and 3000. The 1960,1961, & 1962 model used torsion bar front suspension, with trailing arm suspension rear. Trim lines were base and “Custom.” Engines included the base GMC 305 in³ V6for the GMC version, 135 hp (101 kW) 236 in³ (3.9 L) and 150 hp (112 kW) 261 in³ (4.3 L) straight-6s, and a 283 in³ (4.6 L) V8 with 185 hp (119 kW).

  A coil-spring front suspension came in 1963; along with a new base engine, a 140 hp (104 kW) 230 in³ (3.8 L) I6, and an optional 165 hp (123 kW) 292 in³ (4.8 L) I6. The cab was changed for 1964, with elimination of the “wraparound” windshield and a new front grille design, along with various interior changes. Air conditioning and a 220 hp (164 kW) 327 in³ (5.3 L) V8 came in 1965. A new base engine finished the model in 1966 with a 155 hp (116 kW) 250 in³ (4.1 L) I6.

  Second generation 1967–1972

  Second generation
  Overview
  Production	1967–1972
  Assembly	Atlanta, GA Baltimore, MD Pontiac, MI Flint, MI Tarrytown, NY Kansas City, MO St. Louis, MO Janesville, WI Norwood, OH Fremont, CA Oshawa, ON Buenos Aires, Argentina
  Body and chassis
  Related	Chevrolet Silverado Chevrolet K5 Blazer Chevrolet Suburban
  Powertrain
  Engine	250 cu in (4.1 L) I6 292 cu in (4.8 L) I6 283 cu in (4.6 L) V8 307 cu in (5.0 L) V8 327 cu in (5.4 L) V8 350 cu in (5.7 L) V8 396 cu in (6.5 L) V8 402 cu in (6.6 L) V8GMC models continued to offer the 305 and 351 c.i. V6s through 1970.
  Transmission	3-speed manual 4-speed Muncie SM465 manual 4-speed New Process NP435manual 2-speed Powerglide automatic 3-speed THM-350 automatic 3-speed THM-400 automatic
  Dimensions
  Wheelbase	115 in (2,921 mm) (short box) 127 in (3,226 mm) (long box) 133 in (3,378 mm) (Longhorn)
  Length	188.5 in (4,788 mm) (short box) 207.75 in (5,277 mm) (long box) 213.75 in (5,429 mm) (Longhorn Fleetside) 217.75 in (5,531 mm) (Longhorn Stepside)

  

   1967 GMC C/K

  

   1968 GMC C/K

  A new, more modern look came in 1967, along with a new nickname: “Action Line”. It was with this revision of the C/K truck that General Motors began to add comfort and convenience items to a vehicle line that had previously been for work purposes alone. Updated styling features for the 1967 Chevy Pickup trucks came with new body sheet metal that helps fight rust and a pickup box made of double-walled steel. The majority of 10 and 20 series Chevrolet trucks from 1967 to 1972 were built with a coil spring trailing arm rear suspension, which greatly improved the ride over traditional leaf springs. However, the leaf spring rear suspension was still available on those trucks, and standard on 30 series trucks. The front suspension on all Chevrolet trucks were independent front suspension with coil springs. GMC models came standard with leaf springs with coils springs optional; all four-wheel drive models (Chevrolet and GMC) had leaf springs on both axles. 1967 was the only year for the “small rear window” (RPO A10 offered a large rear window as a factory option^[3]). The standard drivetrain came with a three-speed manual transmission and one of two engines; the 250 in³ straight six or the 283 cu in (4.6 L) V8. The optional transmissions were the four-speed manual, the Powerglide and the Turbo-Hydramatic 350 and 400. The 292 six and the 327 in³ V8 were the optional engines. The 1/2 ton trucks came with a 6 x 5.5–inch bolt pattern, the 3/4 and 1 ton trucks came with an 8 x 6.5–inch bolt pattern.

  In 1968, the 283 cu in (4.6 L) V8 was replaced with a 307 cu in (5.0 L) and a 310 hp (231 kW), 396 cu in (6.5 L) V8 was offered for the first time. The most visible change in differentiating a 1968 from a 1967 was the addition of side-marker reflectors on all fenders. Also, the small rear window cab was no longer available. The GMC grille was revised, with the letters “GMC” no longer embossed in the horizontal crossbar. Another addition was the Custom Comfort and Convenience interior package that fell between the Standard cab and CST cab options. In 1968, Chevrolet celebrated 50 years of truck manufacturing, and to commemorate, they released a 50th Anniversary package, which featured an exclusive white-gold-white paint scheme. Also in 1968, the Longhorn model debuted on 3/4 ton trucks. Featuring a 133-inch wheelbase identical to the one-ton vehicles, it added an extra 6 inches to the bed. Longhorns, interestingly, were 2wd only; no factory Longhorn 4×4 was built.

  

   1971 Chevrolet C/50 medium-duty truck

  

   71-72 Chevrolet C/10 Cheyenne

  The 327 c.i. V-8 engine was enlarged in 1969 to 350 CID (stroke increased from 3.25 to 3.48) with a net horsepower rating of 195-200, depending on emissions package 255 hp (190 kW), 350 cu in (5.7 L). Along with the new engines came a new grille design for Chevrolet trucks and a more upright hood for both Chevrolet and GMC trucks. A utility variant, known as the K5 Blazer, was also introduced with a shorter wheelbase of 104 inches (2,642 mm). The GMC version, known as the Jimmy, was introduced the same year. Some internal cab changes were also made, most notably the switch from a hand-operated parking brake to a foot pedal, and a more modern looking two-spoke steering wheel with plastic horn button replaced the previous year’s three-spoke wheel with chrome horn button. Also new this year were upper and lower side moldings, which added another two-tone paint option. These were standard on CST trucks, and optional in any other trim level.

  

   1970 GMC C/K

  The only noticeable change for 1970 was a minor update to the Chevrolet grille. At first glance, the 1969 and 1970 grilles appear identical. However, the 1970s plastic inserts actually have highlights that break the appearance into six separate sections. The 396, while still sold as such, was enlarged to 402 cubic inches starting in 1970.

  

   1970 Chevrolet Custom/10

  Several changes occurred in 1971. First came another new grille design (the “egg crate”) for Chevrolet trucks and black paint over portions of the GMC grille. Second, an additional trim package was introduced: the Cheyenne. On GMC models, this was referred to as the Sierra. These packages consisted mostly of comfort features — nicer interiors, more padding and insulation, carpet, chrome trim, and upper and lower side molding and tailgate trim. 1971 was the first year for AM/FM radios factory installed. Finally, the front brakes on all light-duty trucks were switched from drum brakes to disc brakes, resulting in much less brake fade under heavy use. While many prior C/K half-ton trucks had used a six-lug bolt pattern (6 x 5.5″) for the wheels, two-wheel-drive models switched to a five-lug pattern (5 x 5–inch bolt circle) common to Buick,Oldsmobile, Pontiac, and Cadillac passenger cars. The 1/2 ton 4 x 4 retained the 6 lug bolt pattern. This bolt pattern would remain the standard through the end of the C/K series (along with the Chevrolet/GMC vans). Also, Chevrolet changed the 396 V8 emblem designation to 400 V8.

  

   1972 GMC Sierra Custom Camper

  The 1972 models were virtually identical to 1971 models, with the only change being the rear view mirror was glued to the windshield instead of being bolted to top of the cab, and metal or vinyl-covered flat door panels were no longer available; all trim level door panels were molded plastic with integral armrests and wood grain inserts on Cheyenne and Sierra trim levels. For restoration, it should also be noted that the door and window cranks were slightly longer due to the molded plastic door panels, and the vent windows were now secured with a single screw on the inside of the door, thus differentiating it from the 1971 model year.

  Engines

  Year	1967	1968	1969	1970	1971	1972
  Inline 6	250 in3 292 in3	250 in3 292 in3	250 in3 292 in3	250 in3 292 in3	250 in3 292 in3	250 in3 292 in3
  V6 (GMC)	305 in3 351 in3	305 in3 351 in3	305 in3
  V8	283 in3 327 in3	307 in3 327 in3 396 in3	307 in3 350 in3 396 in3	307 in3 350 in3 396 in3	307 in3 350 in3 402 in3	307 in3 350 in3 402 in3

  Trim Levels (Chevrolet)

  Years	Base	Mid-level	Top-line	Special
  1967–70	C/10	Custom/10	CST/10
  1971	Custom/10	CST/10	Cheyenne/10
  late 1971–72	CST/10	Cheyenne/10	Cheyenne Super	Cheyenne Highlander

  A 10, 20, or 30 on the emblem indicates 1/2, 3/4, or 1 ton trucks. There are also 40, 50, 60, and 70-series trucks, being a 1½ ton (40), a light duty 2 ton (50), a 2 ton (60), and a heavy duty 2 ton truck (70). These models share the cabin but sit on a taller chassis and have a taller front end of a different design, with a clamshell hood.

  Trim Levels (GMC)

  Years	Base	Mid-level	Top-line	Special
  1967–70	1500	Custom 1500	Super Custom 1500
  1971	Custom 1500	Super Custom 1500	Sierra 1500
  late 1971–72	Super Custom 1500	Sierra 1500	Sierra Grande 1500	Sierra Highlander

  1500, 2500, and 3500 designations were used to indicate 1/2, 3/4, and 1-ton trucks.

  In both series, the ‘Highlander package’ included special color-coordinated houndstooth cloth inserts and additional trim colors and insulation.

  Third generation 1973–1991

  Third generation
  Overview
  Also called	Chevrolet Scottsdale Chevrolet Custom Deluxe Chevrolet Silverado
  Production	1973–1991
  Assembly	Atlanta, Georgia Baltimore, Maryland Pontiac, Michigan Flint, Michigan Tarrytown, New York Kansas City, Missouri St. Louis, Missouri Janesville, Wisconsin Norwood, Ohio Fremont, California Oshawa, Ontario Córdoba (Argentina) Tehran, Iran (1977–1982) Arica, Chile (1978–1988)
  Powertrain
  Engine	250 cu in (4.1 L) I6 292 cu in (4.8 L) I6 262 cu in (4.3 L) V6 305 cu in (5.0 L) V8 350 cu in (5.7 L) V8 400 cu in (6.6 L) V8 454 cu in (7.4 L) V8 350 cu in (5.7 L) Oldsmobile DieselV8 379 cu in (6.2 L) Detroit Diesel V8
  Transmission	3-speed Turbo Hydra-Matic 350automatic 3-speed Turbo Hydra-Matic 400automatic 4-speed Turbo Hydra-Matic 700R4automatic 3-speed Saginaw manual 4-speed Saginaw Muncie SM465 manual 4-speed New Process NV833 overdrive manual
  Dimensions
  Wheelbase	117.5 in (2,984 mm) 135.5 in (3,442 mm) 164.5 in (4,178 mm)
  Length	191.5 in (4,864 mm)(1973–75) 191.3 in (4,859 mm)(1987) 211.8 in (5,380 mm)
  Height	69.8 in (1,773 mm)

  

   Facelifted GMC C/K

  

   1979 Chevrolet C-20 Custom Deluxe Crew Cab with added camper

  An all-new clean sheet redesign of General Motors’ Chevrolet and GMC brand C/K-Series pickups débuted in mid-1972 for the 1973 model year. Development of the new third-generation trucks began in 1968 with vehicle components undergoing simulated testing on computers before the first prototype pickups were even built for real world testing. The redesign was revolutionary in appearance at the time, particularly the cab, departing from typical American pickup truck designs of the era. Aside from being near twins, the Chevrolet and GMC pickups looked like nothing else on the road. The third-generation trucks are officially known as the “Rounded-Line” generation. GM’s “Rounded-Line” moniker highlighted the pickup’s rounded-lines or rounded styling cues that were incorporated into the design. These rounded-lines included rounded windshield corners, rounded cab roof, sloped rounded doors which cut high into the cab roof eliminating roof height, rounded front fenders, and rounded pickup box corners which allowed for rounded or curvedwraparound taillamps, a first for GM pickups. The design also featured strong distinctive curved shoulderlines which rounded out below the beltline. The curved shoulderline continued across the back tailgate on Chevrolet Fleetside and GMC Wideside models. A popular, but incorrect nickname for these trucks is “square body”. As this name did not originate from General Motors, it is therefore not official. The erroneous square body name was propagated through poorly researched truck magazines and dubious word of mouth.

  GM’s design engineers fashioned the “Rounded-Line” exterior in an effort to help improve aerodynamics and fuel efficiency, using wind tunnel technology to help them sculpt the body. Other design traits include “double-wall” construction, sleek sculpted body work, a aerodynamic cab with steep windshield rake, and a unique available hidden radio antenna embedded into the windshield glass.

  There were two types of pickup boxes to choose from. The first type, called Fleetside by Chevrolet and Wideside by GMC, was a “double-wall” constructed full width pickup box and featured a flared shoulderline to complement the cab in addition to rounded box corners and the new aforementioned rounded wraparound taillamps. Both steel and wood floors were available. The second type, called Stepside by Chevrolet andFenderside by GMC, was a narrow width pickup box featuring steps and exposed fenders with standalone tail lamps. Initially, only wood floors were available.

  The wheelbase length was extended to 117.5 in (2985 mm) for the short wheelbase pickups, and 131.5 in (3340 mm) for the long wheelbase pickups. A new dual rear wheel option called “Big Dooley” was introduced on one-ton pickups, along with a new Crew Cab option on the 164.5 in (4,178 mm) wheelbase. An optional Elimipitch camper was made available for the Big Dooley. Crew Cabs were available in two versions: a “3+3” which seated up to six occupants and “bonus cab” which deleted the rear seat and added rear lockable storage in its place. The fuel tank was moved from the cab to the outside of the frame, and a dual tank option was available which brought fuel capacity to 40 US gallons. 1980 was the first year that a cassette tape player could be purchased, along with a CB radio.

  The Rounded-Line generation ultimately ran for a lengthy 19 model years (1973–1991) with the exception of the Crew Cab, Blazer, Jimmy, and Suburban versions, which continued up until the 1991 model year.

  Interior and safety

  The third-generation pickups were offered in several equipment level packages or trim packages. Chevrolet/GMC used various names for the trim levels throughout the vehicle’s life cycle and some were rearranged in their class order. For the 1973 and 1974 model years, the base (standard) trim level was Custom/Custom, mid-range trims were Custom Deluxe/Super Custom, luxury trims were Cheyenne/Sierra, and top-of-the-line luxury trim levels were Cheyenne Super/Sierra Grande.

  For the 1975 model year the trim levels were revised and the base trims were now Custom Deluxe/Sierra, mid-range trims were Scottsdale/Sierra Grande, luxury trims were Cheyenne/High Sierra, and the top-of-the-line luxury trim levels were now known as Silverado/Sierra Classic. They remained in this configuration up to the 1991 model year. For the 1982 model year, the luxury trim levels were dropped, leaving the base, midcurange, and top-of-the-line luxury trim level packages.

  Soft touch materials were used throughout the passenger cabin, such as the dashboard, doors (arm rests), steering wheel, and shift levers. Subtle grained interior panels and bright metal work was used on the inside with high-quality materials also used on the outside, like chrome, aluminium, and polished stainless steel, particularly on top-of-the-line luxury Silverado or Sierra Classic trim levels. Custom Vinyl vinyl or soft Custom Cloth cloth and velour seating surfaces were used along with fabric headliners, door inserts, and plush carpeting, depending on the trim level. Upper class trim levels also used acoustic deadening materials for quieter ride comfort. From model years 1973 to 1977, chestnut wood grain inserts were used on the dashboard and doors for further visual enhancement. The wood grain inserts were replaced by bright brushed aluminiuminserts for model years 1978 to 1987. A Delco AM/FM audio sound system and an all-season climate control system that heated, cooled, cleaned, and dehumidified were optional extras.

  At its launch in 1972, the Rounded-Line C/K-Series introduced two firsts in safety advancements concerning full-size pickups, and would later lead a third safety advancement in 1975. The first was the standard passenger-side sideview mirror, and the second was the energy-absorbing collapsible steering column. Patented by GM and already in use in its cars since 1967, the new energy-absorbing steering column was standard on all C-Series and K-Series models.

  The third safety advancement was the introduction of dual front lap-and-shoulder safety belts with emergency locking retractors for outboard occupants in 1975 for the 1976 model year. These replaced the outdated and inadequate lap belts previously used. A center lap safety belt with slack adjustment was provided for the center occupant. Ford and Dodge would follow one model year later adding lap-and-shoulder safety belts to their pickups.

  Other safety features included soft-padded interior panels for appearance and safety, 3,329 square inches of tempered and laminated safety glass, prismatic rearview mirror, six turn-signal indicator lamps with asymmetrical flash, four-way hazard function, and lane departure function.

  Chassis and powertrain

  

   1988 Chevrolet C-10 Custom Deluxe

  Third-generation Rounded-Line C/K-Series pickups gained an all-new, high tensile strength carbon steel ladder type frame with “drop center” design. Steering controls included variable-ratio recirculating ballsteering gear with optional hydraulic power assist. Braking controls included front self-adjusting disc brakes with rear finned drum brakes and optional four-wheel hydraulic Hydra-Boost or Vacuum-Boost power assist. Engines choices initially consisted of six or eight cylinder engines with either manual or Turbo Hydra-Matic transmissions.

  C-Series pickups included two-wheel drive and featured an independent front suspension (IFS) system with contoured lower control “A” arms and coil springs. GM’s new Load Control rear suspension system took up residence in the back. The Load Control rear suspension system consisted of a rear live axle with dual stage Vari-Rate multi-leaf springs and asymmetrical (offset) shock absorber geometry, to help sort out any “wheel hop” under heavy loads or hard acceleration.

  K-Series pickups included either Conventional, Permanent, or Shift-on-the-move four-wheel drive. The latter system was introduced for 1981. Regardless of the type of four-wheel drive system equipped, all K-Series pickups featured four-corner Vari-Rate multi-leaf springs, front live axle with symmetrical (inline) shock absorber geometry, and the Load Control rear suspension system. K-Series pickups also featured an off road oriented design, with the transfer case bolted directly to the transmission and running gear tucked up as high as possible under the vehicle to reduce the chances of snagging vital components on obstacles, as well as to achieve a low silhouette and optimal ground clearance. Exposed brake lines wrapped in steel were standard, with underbody skid plate armor optional for further protection.

  Conventional four-wheel drive pickups featured manual locking hubs and a two-speed dual range New Process 205 transfer case with four drive modes: Two High, Four High, Neutral, and Four Low. Two High gave a 0:100torque split, while Four High yielded a locked 50:50 torque split. Four Low applied reduction gearing. The front and rear propeller shafts were locked at all times in Four High and Four Low. Neutral allowed for flat towing, or use of the power take off (PTO).

  Permanent four-wheel drive pickups featured a two-speed dual range New Process 203 transfer case with planetary center differential and lock. Five drive modes were provided: High, Low, Neutral, High Loc, and Low Loc. In High the center differential was unlocked and allowed the front and rear propeller shafts to slip as needed for full-time operation. The system could be manually shifted into High Loc which locked the center differential for a locked 50:50 torque split. Low and Low Loc applied reduction gearing with or without lock, depending on the mode selected. Neutral was also available for use of the PTO.

  A new Eaton Automatic Differential Lock (ADL) was introduced in 1973 as an optional extra on the Rounded-Line C/K-Series pickups, for the rear hypoid differential. The new automatic locking differential was offered under the G86 code, replacing the Eaton NoSpin differential, and eventually replacing the old Positraction limited-slip differential in 1974, at which point it assumed the G80 code. The Eaton ADL featured intelligent differential control via an internal governor which monitored vehicle speed and wheel slip to know when to automatically lock and could lockup 100 percent at or below 20 mph (32 kph) increasing tractive effort. The differential lock would unlock and deactivate at speeds above 20 mph for safety reasons, such as the vehicle being on dry pavement.

  Towing and payload capacity ratings for Rounded-Line C/K-Series pickups varied, depending on how they were configured. Factors such as engine and transmission combination, differential gear ratio, curb weight, and whether the pickup was two-wheel drive or four-wheel drive decided how much the pickup could safely tow or haul.

  A properly equipped C-Series half-ton class pickup could tow up to 8,000 lbs (4 tons) of braked trailer, while a properly equipped C-Series three quarter-ton or one-ton class pickup could tow up to 12,000 lbs (6 tons) of braked trailer. Adding four-wheel drive reduced towing capability due to increased curb weight, which resulted from additional driveline components (transfer case, front axle, front differential, front propeller shaft, and so on) needed to facilitate four-wheel drive. A properly equipped K-Series half-ton or three quarter-ton class pickup could tow up to 6,500 lbs (3.25 tons) of braked trailer, whilst a properly equipped K-Series one-ton class pickup could tow 500 lbs more, up to 7,000 lbs (3.5 tons) of braked trailer.

  Heavy-duty towing equipment was available for both C and K-Series pickups, such as the Trailering Special package (included power steering, uprated battery, and uprated generator), 7-pin trailer electrics connector, heavy-duty engine oil cooler, heavy-dutytransmission oil cooler, and a weight distributing trailer hitch.

  For the 1975 model year, the 185 hp 400 cu in (6.6 L) small-block V-8 was added to the line and there was a realignment of Chevy trim levels, along with new grilles and clear/white instead of orange front turn signals. Base models gained a passenger-side woodgrain dash accent and a new plaid upholstery pattern (which would change slightly each year until 1978).

  A new gauge to show voltage replaced the ammeter in 1976, and the engine size decals were removed from the grille during this model year.

  For 1977 models, power windows and power door locks were introduced as an optional extra. There was another round of new grilles, revised inner door panels that left less metal exposed, a four-wheel drive, full one-ton chassis was added to the lineup, and a Dana 60 was used for the front axle, as well as an electric oil pressure gauge replacing the mechanical unit. Trucks with an optional trim level, but without an additional wheel upgrade, received flatter stainless steel hubcaps, still with painted accents. This was also the only year with yellow painted trim instead of black.

  The addition of the first diesel engine of the three American automakers in a light duty pickup the 125 hp 350 cu in (5.7 L) Oldsmobile diesel V-8 began in 1978. All models got new, flatter dash trim panels, black on the lower two trims and aluminum-look on the fancier two. Base models received the flatter stainless hubcaps, and Stepsides got new squared-off taillights with built-in backup lights and side markers, while the rear fenders were smoothed out where the old side markers were.

  The 1979 models got a new grille surround that incorporated the turn signals; inside there was a new full-width “houndstooth” seat trim on base models and a (rare) fifth interior color option on the higher series called “oyster” by Chevrolet and “Mystic” by GMC (mostly white with a gray dash, carpeting and cloth). Fuel doors were added to the bed sides to hide the previously exposed fuel caps.

  For the 1980 model year, permanent four-wheel drive was discontinued on K-Series, leaving only conventional four-wheel drive. Some pickups gained a new grille, others did not; high-trim Chevys had both a new surround that incorporated near-flush square headlights and revised turn signals with a new, squarer grille pattern, while a GMC base model was entirely carryover, base Chevys had the new center section in the 1979 surround while GMCs with uplevel trims or the separate RPO V22 option had the new square-light surround with the main grille introduced in 1977. Blue interiors were a darker shade than before.

  Engines

  Year	Engine	Power	Torque	Notes
  1981–1984	4.1 L GMC 250 I-6	115 hp (86 kW) @ 3600 RPM	200 lb·ft (271 N·m) @ 2000 RPM
  1983		120 hp (89 kW) @ 4000 RPM	205 lb·ft (278 N·m) @ 2000 RPM	C1
  1985–1986	4.3 L LB1 90º V-6	155 hp (116 kW) @ 4000 RPM	230 lb·ft (312 N·m) @ 2400 RPM
  1987-1991		160 hp (119 kW) @ 4000 RPM	235 lb·ft (319 N·m) @ 2400 RPM
  1981–1985	4.8 L GMC 292 I-6	115 hp (86 kW) @ 3400 RPM	215 lb·ft (292 N·m) @ 1600 RPM
  1986		115 hp (86 kW) @ 4000 RPM	210 lb·ft (285 N·m) @ 800 RPM
  1981–1982	5.0 L 305 V-8	130 hp (97 kW) @ 4000 RPM	240 lb·ft (325 N·m) @ 2000 RPM	2-barrel
  1981–1982		165 hp (123 kW) @ 4400 RPM	240 lb·ft (325 N·m) @ 2000 RPM	1/2 Ton w/ 4-barrel
  1981–1982		160 hp (119 kW) @ 4400 RPM	235 lb·ft (319 N·m) @ 2000 RPM	all others w/ 4-barrel
  1983–1986		165 hp (123 kW) @ 4400 RPM	240 lb·ft (325 N·m) @ 2000 RPM	less than 8500# GVWR
  1983		160 hp (119 kW) @ 4400 RPM	235 lb·ft (319 N·m) @ 2000 RPM	over 8500# GVWR
  1987-1991		170 hp (127 kW) @ 4000 RPM	260 lb·ft (353 N·m) @ 2400 RPM
  1981–1986	5.7 L 350 V-8	165 hp (123 kW) @ 3800 RPM	275 lb·ft (373 N·m) @ 1600 RPM	less than 8500# GVWR
  1987		210 hp (157 kW) @ 4000 RPM	300 lb·ft (407 N·m) @ 2800 RPM
  1981–1985		160 hp (119 kW) @ 3800 RPM	250 lb·ft (339 N·m) @ 2800 RPM	over 8500# GVWR
  1986		185 hp (138 kW) @ 4000 RPM	285 lb·ft (386 N·m) @ 2400 RPM
  1987		185 hp (138 kW) @ 4000 RPM	295 lb·ft (400 N·m) @ 2400 RPM
  1981–1982	7.4 L 454 V-8	210 hp (157 kW) @ 3800 RPM	340 lb·ft (461 N·m) @ 2800 RPM
  1983–1985		230 hp (172 kW) @ 3800 RPM	360 lb·ft (488 N·m) @ 2800 RPM
  1986		240 hp (179 kW) @ 3800 RPM	375 lb·ft (508 N·m) @ 3200 RPM
  1987		230 hp (172 kW) @ 3600 RPM	385 lb·ft (522 N·m) @ 1600 RPM
  1982–1987	6.2 L Detroit Diesel V-8	130 hp (97 kW) @ 3600 RPM	240 lb·ft (325 N·m) @ 2000 RPM	less than 8500# GVWR
  1982–1984		135 hp (101 kW) @ 3600 RPM	240 lb·ft (325 N·m) @ 2000 RPM	over 8500# GVWR
  1985–1991		148 hp (110 kW) @ 3600 RPM	246 lb·ft (334 N·m) @ 2000 RPM

  1981 mid-life cycle facelift

  A mid-life cycle cosmetic facelift and mechanical refresh was carried out for the 1981 model year. In response to the recent 1979 energy crisis, the 1981 rework featured several fuel saving techniques to help make the Rounded-Line C/K-Series pickups more fuel efficient. Again, engineers turned to wind tunnels to resculpt the front end with new sheet metal, reducing areas which could hinder air flow and cause drag. A sleeker front bow-like look emerged, similar to a ship’s bow with the front end being gently swept back from the center. New dual tier halogen headlamps became available with the Deluxe Front Appearance package. Mechanical updates included more anti-corrosion techniques, reduced weight, and a new 5.0 L 305 cubic inch V-8 with electronic spark control. The 5.7 L 350 cubic inch pushrod V-8 was dropped from the half-ton class pickups, except in California where it was offered in place of the new 5.0 L 305 engine with electronic spark control, which did not meet California’s emissions requirements.

  A new Shift-on-the-move four-wheel drive system with two-speed dual range New Process 208 aluminium transfer case was introduced on K-Series pickups for the 1981 model year. It replaced the permanent four-wheel drive system, on pre-1980 models. The shift-on-the-move four-wheel drive system featured new automatic self locking hubs and synchronized direct high range planetary gearing, such that the truck could be shifted from two-wheel drive, to fully locked four-wheel drive at speeds of up to 25 mph. Once the shift from two-wheel drive to four-wheel drive was made, the vehicle could be driven at any forward or reverse speed. Four drive modes were offered: Two High, Four High, Neutral, and Four Low. Two High gave a 0:100 torque split, with Four High yielding a locked 50:50 torque split through direct synchronized gearing. Four Low applied reduction gearing. The front and rear propeller shafts were locked at all times in Four High and Four Low. Neutral was provided for disengagement of both propeller shafts. Conventional four-wheel drive was still available with manual locking hubs.

  A new four-speed Turbo Hydra-Matic 700R4 transmission with overdrive gearing became available in 1981 for the 1982 model year. The 151 hp 379 cu in (6.2 L) Detroit Diesel V-8 was added to replace the LF9 Oldsmobile diesel. Chrome front bumpers were now standard on base models.

  1985 saw the new 262 cu in (4.3 L) LB1 introduced to replace both inline-six engines. Hydraulic clutches were introduced. Also, a new grill was used. The most expensive radio was the AM/FM stereo seek/scan with cassette tape at $594. A variation of the C/K series was introduced in 1985 in Brazil, replacing the locally produced C10, introduced in 1964.

  R/V-Series

  For the 1991 model year, the last model year for the conventional cab pickups, the Rounded-Line C/K-Series were renamed the R/V-Series. R-Series now designated two-wheel drive, while V-Series represented four-wheel drive. The name change is also found in the vehicle identification number. This was done in preparation for the next generation GMT400 trucks, which were produced concurrently with the older line. The new 1988 model trucks entered production December 8, 1986 at Pontiac East, Oshawa, and the new Fort Wayne plant. The 1987 models continued to be built at Janesville, St. Louis, and Flint.

  Along with the name change, came other major improvements and tweaks for the final model year of the conventional cab pickups. Single-point electronic throttle-body fuel injection (TBI) was introduced on GM’s full-size pickups, with new electric fuel pumps and high-pressure fuel lines. In addition, a “smart” powertrain control module (PCM) was also introduced, which controlled the fuel injection system, fuel-to-air burn ratio, engine ignition timing, and (if equipped with an automatic transmission) the Turbo Hydra-Matic’sturbine torque converter clutch. The 5.7 L 350 cubic inch pushrod V-8 was reintroduced to the order books for R-Series and V-Series half-ton class pickups, with the new TBI fuel injection system. Horsepower and torque output was increased to 210 hp, and 300 lb-ft of torque.

  After 1987, R/V remained in use for the Rounded-Line one-ton crew cab pickups through 1991 (built at Janesville), and the Rounded-Line utilities (Chevrolet K5 Blazer and Suburban, built at Flint) through 1991. From the 1988 model year and onward, C/K was re-used for the fourth-generation “GMT400” design.

  • 

    1979 GMC K15 Sierra Grande Regular Cab Short Bed Stepside

  • 

    Pre-facelift Chevrolet C/K

  • 

    Pre-facelift GMC C/K

  • 

    1986 Chevrolet C30 Silverado 3+3 Double Cab conversion

  • 

    GMC Medium-Duty conventional, predecessor to the Topkick

  Sidesaddle fuel tank controversy

  The third generation of GM’s full-size pickup line featured a fuel tank design that saw some criticism after the model run ended. The fuel tank was relocated from the cab to the outboard sides of one or both frame rails beneath the cab floor extending under the leading edge of the pickup box, commonly referred to as a sidesaddle arrangement. This enlarged fuel capacity from 16 up to 40 gallons depending on wheelbase and the number of tanks. This also removed the tank from the passenger compartment.

  According to a now debunked 1993 report which aired on Dateline NBC, this arrangement made the trucks capable of exploding when involved in a side collision. The faked video was staged by an expert witness for hire against GM, Bruce Enz of The Institute for Safety Analysis. Enz used incendiary devices and a poorly fitted gas cap to create the impression of a dangerous vehicle. It was also revealed that the Dateline report was dishonest about the fuel tanks rupturing and the alleged 30 mph (48 km/h) speed at which the collision was conducted. The actual speed was found to be higher, around 40 mph (64 km/h), and after x-ray examination of the fuel tanks from the C/K pickups used in the staged collision, it was discovered they had not ruptured and were intact.

  Fatality figures vary wildly. A study by Failure Analysis Associates (now Exponent, Inc.) found 155 fatalities in these GM trucks between 1973 and 1989 involving both side impact and fire. The Center for Auto Safety, Ralph Nader’s lobbying group, claims “over 1,800 fatalities” between 1973 and 2000 involving both side impact and fire. Other commentators noted that regardless of any increased risk of fire, the GM trucks had statistically indistinguishable safety records in side-impact crashes from their Ford and Dodge equivalents.

  Also notable, was the fact that the sidesaddle fuel tanks themselves, were found to have a well-engineered robust design and form factor, which was highly resistant to crushing or crumpling from a side-impact. The heavy-duty design of the sidesaddle fuel tanks allowed them to not only comply with, but also far exceed the U.S. government’s safety standards, which specifically address the dangers of fuel tank rupturing in side collisions. Studies showed that it would take about 4,000 side-impact crashes with a Rounded-Line GM pickup to get one with fire, major injury, or fatality.

  In 1993 the bad publicity generated by the later debunked Dateline story spawned several class action lawsuits. As settlement GM offered owners $1000 coupons toward the purchase of a new truck with a trade-in of the old one. Even though the trucks met NHTSA 15 and 20 mph side impact crash test standards in place at the time of manufacture, GM eventually settled with the U.S. National Highway Traffic Safety Administration (NHTSA) in 1994 for the amount of $51 million to be used for safety programs. The fourth-generation C/K-Series pickups (1988–2001) were designed and produced well before the lawsuits, with one fuel tank inside the frame rails.

  Foreign production

  Sevel Argentina S.A. built the Chevrolet C10 in its Córdoba plant from 1985 to 1991. The gasoline version used the Chevy 250 CID engine (4,093 cc) familiar to most Latin American markets, producing 130 hp. Because of Sevel being a subsidiary of Peugeot, the C10 was also available with a 70 hp Indénor XD2 2,304 cc diesel engine, perhaps best known in the US from the Peugeot 504.

  Fourth generation 1988–2002 (GMT400)

  Fourth generation / GMT400
  Overview
  Also called	Chevrolet Silverado GMC Sierra
  Production	1988–2002
  Assembly	Oshawa, Ontario Pontiac, Michigan Flint, Michigan Fort Wayne, Indiana Córdoba, Argentina
  Body and chassis
  Platform	GMT400/480
  Powertrain
  Engine	250 cu in (4.1 L) I6 (Brazil) 262 cu in (4.3 L) V6 305 cu in (5.0 L) V8 350 cu in (5.7 L) V8 454 cu in (7.4 L) V8 MWM Sprint 6.07T engine (4.2L) I6diesel 378 cu in (6.2 L) diesel V8 6.5 L turbo diesel V8
  Transmission	3-speed THM-400 automatic 4-speed 700R4 automatic 4-speed 4L60 automatic 4-speed 4L60-E automatic 4-speed 4L80-E automatic 4-speed SM465 manual 5-speed NV3500 manual 5-speed ZF 5S-42 manual 5-speed NV4500 manual 5-speed HM290 manual 5-speed 5LM60 manual
  Dimensions
  Wheelbase	117.5 in (2,984 mm) 131.5 in (3,340 mm) 141.5 in (3,594 mm) 155.5 in (3,950 mm)
  Length	194.5 in (4,940 mm) 213.1 in (5,413 mm) 218.5 in (5,550 mm) 237.4 in (6,030 mm)
  Width	76.8 in (1,951 mm) 77.1 in (1,958 mm)
  Height	73.2 in (1,859 mm) 72.6 in (1,844 mm)

  Development of these trucks began around 1984 and were introduced in September 1987 as 1988 models (known as the GMT400 platform), there were eight different versions of the C/K line for 1988: Fleetside Single Cab, Fleetside Extended Cab, Fleetside Crew Cab, and Stepside Single Cab, each in either 2WD (C) or 4WD (K) drivelines. All C/K models would ride on independent front suspension. Three trim levels were available: Cheyenne, Scottsdale, and Silverado. Engines were a 160 hp (119 kW) 4.3 L V6, a 175 hp (130 kW) 5.0 L V8, a 210 hp (157 kW) 5.7 L V8 and a 6.2 L diesel V8. A 230 hp (172 kW) 7.4 L V8 was available in the 3/4-ton and one-ton trucks. To enhance durability the trucks featured extensive use of galvanized steel for corrosion resistance and a fully welded frame with a boxed front section for strength and rigidity.

  4×4 front suspension

  A drastic difference between the third-generation and fourth-generation GM trucks was the suspension; the fourth-generation GM trucks used all independent front suspensions (IFS).

  In 1989, a half-ton 2WD fleetside Sport appearance package was available with black and red bumper and body trim, and a black grille with red outlined Chevrolet emblem, chrome wheels with custom center caps, and fog lights. The 89 was a limited production run set to determine how well the “sport” package would be received by consumers in the years to follow. The Sport package was more of a trim and towing package edition as well as a few engine enhancements that weren’t on available on other Chevrolet trucks of the time.

  Also in 1989, the 4×4 sport appearance package included black bumper and body trim, wheel flares, mirrors, sport grille, 16–inch cast-aluminum wheels and special “4×4” badging on the box and “SPORT” badged on the tailgate. The box and tailgate decals were flanked by red-outlined Chevy bow ties. The sport package was only offered from 1989 until 1992 as some insurance companies began to express concerns with the idea of a high-performance truck. RPO code was BYP. This model was only available with the standard cab and regular fleet-side box. Colors included white, black, and red. A Z71 off-road package was also available with skid plates and Bilstein shocks, making it the first off-road package offered by the big three automakers and a few years later Ford would make their own the FX4 package. The Work Truck (W/T) was also introduced in 1990, which featured a single-cab long bed with Cheyenne trim and new grille with black bumpers. Also in 1988 the GMC 3500 EFI with a 454 (7.4 L) was available. The 454 EFI produced 230 hp (172 kW) and 385 lb·ft (522 N·m). In 1991, the 4L80-E automatic transmission was available for the 3/4-ton and one-ton trucks. In 1992, the four-speed manual transmission was dropped and the stepside trucks were available with extended cabs. The 6.5-liter diesel V8 was also made available with a turbocharger. In 1989, a Sport package was available for the fleet side short-bed Chevrolet trucks, featuring body-colored, striped molding, body-colored bumpers,and a blacked-out grille with chrome-plated steel wheels and specialized chromed plastic center caps. The Sport package also included a standard Chevrolet Receiver hitch and stiffer rear suspension, as well as oil and transmission cooling lines and heftier brake package. Of the first 1989 Silverado sport trucks there were only 5,400 produced. The Sport was re-introduced in 1990, this time with composite headlights and different sport emblems on the bedsides. This is one of the most frequently faked looks for the Chevrolet trucks but VIN decoding will reveal if it is a true “sport” or not. 1994 models received a new front fascia, federally mandated CHMSL, many new exterior colors including a new two-tone option on the rocker panels, and new tire and wheel combinations. All 1995 models received a new interior that included a new steering wheel containing a driver’s-side airbag, a new dashboard containing a more central-mounted radio, dial-operated HVAC system and an improved gauge cluster. New front door panels, and new seating were also included. Late 1995 the 1500 series and 2500 series two-wheel drive trucks were assembled with the newer 4L60E transmission and the 700 R4 was no longer used at this point. Exterior changes this year included a special two-tone paint job, available in many different varieties new gloss black folding exterior mirrors, and the door handles were changed from a smooth gloss black finish to a textured, satin finish. In 1996, a passenger-side-mounted third door was optional on extended cab models. A new range of engines was included. The “Vortec” engines meant HP increases across gasoline V6 and V8 small-block engines. The 6.2 diesel V8 was dropped.

  1997 saw a passenger-side airbag on 1500 models in order to comply with new federal regulations for light trucks. 2500 and 3500 models are exempt. This meant a slight dashboard redesign to incorporate these airbags. On models where passenger airbags weren’t included, the space was occupied by a storage compartment. Also, 1997 was to be the last year the C/K Silverado would display CHEVROLET on the tailgate.

  

   1997 Silverado, displaying “CHEVROLET” on the tailgate

  1998 meant minor trim and badge updates as GM readied the end of the GMT-400 platform. There was some overlap in 1999–2002 model years. In response to continued fleet sales, the GMT400 trucks were produced as the Sierra Classic/Silverado Classic until the GMT400 ended production at the end of the 2002 model year. A Brazilian version of the GMT400 was produced in Brazil powered with a Chevrolet inline six, a 4.2-liter I6 MWM Sprint Turbodiesel and a 4.0L I4 NA Maxion Diesel.

  The GMT400 and G-Van were the last two platforms to utilize the traditional small-block Chevrolet V8 in the 2002 model year.

  The GMT800 platform was introduced in 1999 as the Silverado/Sierra.

  Engines

  Engine	Years	Power	Torque	Notes
  4.3 L V6	1988–1989	160 hp (120 kW) @ 4000 RPM	235 lb·ft (319 N·m) @ 2400 RPM
  	1990–1992	160 hp (120 kW) @ 4000 RPM	235 lb·ft (319 N·m) @ 2400 RPM	less than 8500# GVWR
  	1993	165 hp (123 kW) @ 4000 RPM	235 lb·ft (319 N·m) @ 2000 RPM
  	1990	150 hp (110 kW) @ 4000 RPM	230 lb·ft (310 N·m) @ 2400 RPM	over 8500# GVWR
  	1991–1993	155 hp (116 kW) @ 4000 RPM	230 lb·ft (310 N·m) @ 2400 RPM
  	1994	165 hp (123 kW) @ 4000 RPM	235 lb·ft (319 N·m) @ 2000 RPM
  	1995	160 hp (120 kW) @ 4000 RPM	235 lb·ft (319 N·m) @ 2000 RPM
  	1996–1998	200 hp (150 kW) @ 4400 RPM	255 lb·ft (346 N·m) @ 2800 RPM
  5.0 L V8	1988–1994	175 hp (130 kW) @ 4000 RPM	270 lb·ft (370 N·m) @ 2400 RPM
  	1994–1995	175 hp (130 kW) @ 4200 RPM	265 lb·ft (359 N·m) @ 2800 RPM
  	1996–1998	230 hp (170 kW) @ 4600 RPM	285 lb·ft (386 N·m) @ 2800 RPM
  5.7 L V8	1988–1994	210 hp (160 kW) @ 4000 RPM	300 lb·ft (410 N·m) @ 2800 RPM	less than 8500# GVWR
  	1994–1995	200 hp (150 kW) @ 4000 RPM	310 lb·ft (420 N·m) @ 2400 RPM
  	1988	185 hp (138 kW) @ 4000 RPM	295 lb·ft (400 N·m) @ 2400 RPM	over 8500# GVWR
  	1989–1995	190 hp (140 kW) @ 4000 RPM	300 lb·ft (410 N·m) @ 2400 RPM
  	1996–2000	255 hp (190 kW) @ 4600 RPM	330 lb·ft (450 N·m) @ 2800 RPM
  6.2 L V8 N/A Diesel	1988–1989	126 hp (94 kW) @ 3600 RPM	240 lb·ft (330 N·m) @ 2000 RPM	less than 8500# GVWR w/ MTX
  	1990	135 hp (101 kW) @ 3600 RPM	240 lb·ft (330 N·m) @ 2000 RPM
  	1988–1989	140 hp (100 kW) @ 3600 RPM	247 lb·ft (335 N·m) @ 2000 RPM	less than 8500# GVWR w/ ATX
  	1990	140 hp (100 kW) @ 3600 RPM	250 lb·ft (340 N·m) @ 2000 RPM
  	1988–1989	143 hp (107 kW) @ 3600 RPM	257 lb·ft (348 N·m) @ 2000 RPM	over 8500# GVWR
  	1990	150 hp (110 kW) @ 3600 RPM	265 lb·ft (359 N·m) @ 2000 RPM
  	1991–1993	140 hp (100 kW) @ 3600 RPM	255 lb·ft (346 N·m) @ 1900 RPM	less than 8500# GVWR
  	1991	150 hp (110 kW) @ 3500 RPM	280 lb·ft (380 N·m) @ 2000 RPM	over 8500# GVWR
  	1992	148 hp (110 kW) @ 3600 RPM	246 lb·ft (334 N·m) @ 2000 RPM
  	1993	150 hp (110 kW) @ 3500 RPM	280 lb·ft (380 N·m) @ 2000 RPM
  6.5 L V8 N/A Diesel	1994–1995	155 hp (116 kW) @ 3600 RPM	275 lb·ft (373 N·m) @ 1700 RPM
  6.5 L V8 Turbo Diesel	1992	180 hp (130 kW) @ 3500 RPM	380 lb·ft (520 N·m) @ 1700 RPM
  	1993	190 hp (140 kW) @ 3400 RPM	380 lb·ft (520 N·m) @ 1700 RPM
  	1994–1997	180 hp (130 kW) @ 3400 RPM	360 lb·ft (490 N·m) @ 1700 RPM	less than 8500# GVWR
  	1998–1999	180 hp (130 kW) @ 3400 RPM	360 lb·ft (490 N·m) @ 1800 RPM
  	1994–1997	190 hp (140 kW) @ 3400 RPM	385 lb·ft (522 N·m) @ 1700 RPM	over 8500# GVWR
  	1998–1999	195 hp (145 kW) @ 3400 RPM	430 lb·ft (580 N·m) @ 1800 RPM
  	2000–2002	195 hp (145 kW) @ 3400 RPM	420 lb·ft (570 N·m) @ 1800 RPM	w/ MTX
  	2000–2002	195 hp (145 kW) @ 3400 RPM	430 lb·ft (580 N·m) @ 1800 RPM	w/ ATX
  7.4 L V8	1988–1995	230 hp (170 kW) @ 3600 RPM	385 lb·ft (522 N·m) @ 1600 RPM
  	1996–2000	290 hp (220 kW) @ 4000 RPM	410 lb·ft (560 N·m) @ 3200 RPM
  	1991–1993	255 hp (190 kW) @ 4000 RPM	405 lb·ft (549 N·m) @ 2400 RPM	454SS
  8.1 L V8	2001–2002	340 hp (250 kW) @ 4200 RPM	455 lb·ft (617 N·m) @ 3200 RPM

  454 SS

  In 1990, Chevrolet introduced the first high-performance racing focused truck of the big three automakers a high-performance variant of the GMT400 under the Super Sport emblem called the 454SS. It was available only as a 2WD half-ton regular cab short box in Onyx Black only with a garnet red interior. The 454SS was powered by a 454 cu in (7.4 L) V8 producing 230 hp (172 kW) and 385 lb·ft (522 N·m). A 3-speed automatic transmission (Turbo Hydra-Matic 400) and 3.73 rear axle ratio added to the truck’s performance. The axle itself is unique, being a 14-bolt semi-floating unit which uses standard Chevrolet 5 on 5-inch wheels—the only factory-produced 14-bolt axle with such a wheel bolt pattern. The suspension was also upgraded with 32 mm (1.3 in) Bilstein gas-filled shock absorbers, a 32 mm (1.3 in) front stabilizer bar, and 12.7:1 fast-ratio steering gear assembly.

  Unique exterior features included a front air dam with fog lights, special rims, decals displaying “454SS” on the bed sides, red trim emblems, and black painted grille, bumpers, and mirrors. The interior was also unique with a special plush Garnet Red cloth with black trim, high-back reclining sport bucket seats, and center console.

  For 1991, a four-speed electronic automatic transmission (known as the 4L80E), 25 more horsepower, and even higher torque (405 lbs/ft at 2400 rpm) were added to the 454SS. The rear-axle ratio was also lowered to 4.10:1 for extra jolt off the line. On the dash was a tachometer, oddly omitted from 1990 models. Dual exhaust was also added during the ’91-’94 model years.

  The MSRP of the 1990 model was US$18,295 with a $550 destination charge. A total of 16,953 units were sold over the 4 years the 454SS was in production, with 1990, the first year of production, selling 13,748 units alone. The 454SS was discontinued after the 1994 model year.

  In 1992–1994 other color options included Summit White and Victory Red, with multiple interior colour options. The rear quarter panel and tailgate decals also changed in 1992 to a more ‘stylized’ ‘SS’ and the Chevrolet sticker on the tailgate became much smaller and located on the corner area.

  • 

    Chevrolet 454SS

  • 

    1988–1989 Chevrolet C/K 1500 regular cab

  • 

    1988–1989 Chevrolet C/K conversion

  • 

    c. 1997–1999 K-Series brush truck near Tallahassee, Florida

  • 

    1991–1993 Chevrolet C/K regular cab

  • 

    1993 Chevrolet C/K Extended Bed

  • 

    1995 Chevrolet C/K Extended Cab

  • 

    1997-1999 Chevrolet C/K Extended Cab

  • 

    GMC C/K Sierra regular cab

  • 

    Chevrolet K2500 6.5 TurboDiesel with NV4500 Transmission

  • 

    Chevy K3500 Crew Cab “Dually”

  C3500 HD

  

   GMC 3500HD Cab and Chassis with Dump Body

  In 1991 GM introduced a 15,000 pound GVWR truck C3500 HD under the Chevrolet and GMC nameplates that was replaced by the 4500. It was marketed as a truck to bridge the gap between light duty trucks “pickup trucks” and medium duty trucks. The C3500 HD was only offered as a standard chassis cab until 1996 when a crew chassis cab was also offered. It is not clear if the crew cab was for fleet orders only, or if anyone could order it. An extended cab was never offered on the C3500 HD, though several have been custom made by the registered owners. All paint colors and most options were offered in the C3500 HD. Upper cab marker/clearance lights were not optional equipment on the C 3500HD. The two mirror options are the camper style and west coast style mirrors.

  The common drive axle used on the C3500 HD was the Dana 80, an 85.8-inch-wide full floating axle with an 11-inch ring gear fitted with 19.5–inch x 6.0 tires. The front axle was a solid I-beam drop axle, similar to the axles of medium and heavy duty trucks. Both front and rear leaf sprung axles had disc brakes.

  Available wheelbases were; 135.5 inches, 159.5 inches, and 183.5 inches. The C3500 HD frames are very different from the C/K3500 cab and chassis. The C/K3500 cab and chassis and C3500 HD rear frame rails are spaced at industry standard 34 inches for easy fitment of bodies but that is where the similarity ends. The HD frame is much heavier and exits straight out behind the high mounted cab necessitating the unmistakable HD filler panel between the bumper and grille. The front fenders were also equipped with the same flares used on 4×4 models of the lighter trucks to cover the increased track width and larger tires.

  Two transmissions were offered in the C3500 HD; the 4L80E 4-speed OD automatic, and the NV4500 5-speed manual.

  GM never offered a four-wheel-drive counterpart of the C3500 HD, so there was no K3500 HD. Several aftermarket conversion companies offered a 4×4 version with either a Dana 60 or Dana 70 front axle. At least one company, Monroe Truck, was offered by GM dealers as a ship-through 4WD upfit using the RPO code VCB. Tulsa is another company that did 4×4 conversions for utility companies. Quigley conversions were mostly for fire/ambulance applications.

  Engines 1991–2000

  Engine offerings for the C3500 HD included three gasoline engines; from 1991 to 1995 5.7L 350 Small Block and 7.4L GEN V Big Block. In 1996 both the 5.7 and GEN V 7.4 were replaced by the new Gen VI 7.4L Vortec Big Block.

  One of the main additions to the 1991–2000 years is that it introduced the 305 cu in a traditional 5.0L V8 and also in a 5.7L V8 which was most common in the SLE packages.

  The RPO L65 6.5L Turbo Diesel debuted in the C3500 HD in 1992, the year of the engine’s release. The 6.5 was the only diesel engine offered for the entire production run of the T400 C3500 HD. No diesel was available for 1991, the first C3500 HD production year.

  Engines 2001–2002

  While all other C/K pickup models were dropped by 2000, the C3500 HD was produced until 2002 due to fleet demand. In the brochures it is referred to as Sierra Classic/Silverado Classic. There were two engine choices; The 8.1L Vortec Big Block replaced the Gen VI 7.4L Vortec Big Block and the venerable 6.5L Turbo Diesel.

  Brazilian versions

  A variant of the C/K family was introduced in Brazil during the 1960s. These used the instrument cluster from the 1960–66 US Chevrolet C/K series although the exterior sheet metal layout is exclusive to Brazil. The models built included a light truck, named C-10, and a SUV named Veraneio (initially known simply as Chevrolet C-1416), introduced in 1964. They were initially powered with a Chevrolet 4.2 l (260 cu in) inline six based on the pre-1962 “Stovebolt” engines. Later they used the 4.1 l (250 cu in) engine from the Chevrolet Opala. In later years a four-cylinder diesel (Perkins Q20B) was also offered labeled as D-10 (light truck only). An ethanol-powered version of the C-10 was offered beginning in the 1981, dubbed the A-10.

  After 1985, a redesigned pickup similar to the U.S. 1973–87 C/K truck was introduced as the C-20, powered with the 4.1 l (250 cu in) inline six of the U.S. Chevy II/Nova. Diesel and ethanol versions were also sold, labeled as D-20 and A-20 respectively (later models of the D-20 replaced the Perkins Q20B with a Maxion S4). The original version of the Veraneio was kept in production until 1988 (model year 1989), but it was eventually replaced with an updated version based on the C-20 family.

  In 1997 GM introduced in Brazil the then-current Silverado pickup, which lasted until 2001, and the Tahoe, which in Brazil was named the Grand Blazer. The 4.1 L (250 cu in) inline six engine with 138 hp (103 kW) was offered on both models with option for a MWM4.2 L (260 cu in) turbo diesel engine producing 168 hp (125 kW). But the model earned a reputation for being a less capable work vehicle than its predecessor. After the Silverado was discontinued in Brazil, GM ceased offering any trucks in this sector in Brazil.

  • 

    1974 Chevrolet Veraneio

  • 

    1974 Chevrolet Veraneio rearview

  • 

    green Chevrolet Veraneio

  • 

    Civil Police of Sao PauloChevrolet Veraneio in the museum of the São Paulo Polícia Civil.

    Chevrolet Silverado

    From Wikipedia, the free encyclopedia

    For the Chevrolet C/K series Silverado, see Chevrolet C/K.

    Chevrolet Silverado/GMC Sierra
    Overview
    Manufacturer	Chevrolet/GMC (General Motors)
    Also called	GMC Sierra Chevrolet Cheyenne (Mexico) VIA VTRUX VTA SolTRUX Chevrolet C/K (South Korea)
    Production	1998–present
    Assembly	Flint, Michigan Roanoke, Indiana Silao, Mexico
    Body and chassis
    Class	Full-size/Heavy-Duty pickup
    Body style	2-door regular cab 3-door extended cab 4-door extended cab 4-door crew cab Dually
    Layout	Front-engine, Rear-wheel drive /Four-wheel drive / All-wheel drive
    Chronology
    Predecessor	Chevrolet/GMC C/K

    The Chevrolet Silverado, and its mechanically identical cousin, the GMC Sierra, are a series of full-size and heavy-duty pickup trucks manufactured by General Motors and introduced in 1999 as the successor to the long-running Chevrolet C/K line. The Silverado name was taken from a trim level previously used on its predecessor, the Chevrolet C/K pickup trucks and Suburbans from 1975 through 1998. General Motors continues to offer a GMC-badged variant of the Chevrolet full-size pickup under the GMC Sierra name, first used in 1988 for its variant of the GMT400 platform trucks.

    History

    Although General Motors introduced its first pickup truck in 1930, the term “Silverado” was a designation used only to detail the trim for the Chevrolet C/K pickup trucks, Suburbans, and Tahoes from 1975 through 1999. GMC used a few variations of the “Sierra” name (Sierra, High Sierra). However Chevrolet still uses the CK and the CC in their current model codes.

    

     1997 C/K with Silverado Trim Package, displaying CHEVROLET on the tailgate.

    The Chevrolet Silverado and GMC Sierra trucks have been essentially the same for their entire history. The Silverado today is generally advertised as the “standard” version and is more aimed for use in agriculture, while the Sierra is aimed for industrial workers but can be ordered as a well equipped luxury truck. There are some trim and option variations as well. Early models included variations in the engine and equipment, but the present differences are slight. The 1999 redesign included different grilles and interior trim, and certain features (e.g. Quadrasteer) were included at different times on the two trucks. Chevrolet did not create a Denali equivalent for the Silverado. However, the GMC Sierra has a Denali model.

    First generation (1999–2006)

    First generation
    Overview
    Also called	Chevrolet C/K (South Korea)
    Production	1998–2006
    Designer	Ken Sohocki (1994)
    Body and chassis
    Platform	GM GMT800 platform
    Powertrain
    Engine	Vortec 4300 (4.3 L) V6 Vortec 4800 (4.8 L) V8 Vortec 5300 (5.3 L) V8 Vortec 6000 (6.0 L) V8 Vortec 8100 (8.1 L) V8
    Transmission	4-speed 4L60-E automatic 4-speed 4L65-E automatic 4-speed 4L80-E automatic 5-speed NV3500 manual
    Dimensions
    Wheelbase	119 in (3,023 mm) 133 in (3,378 mm) 143.5 in (3,645 mm)
    Length	203 in (5,156 mm) 227 in (5,766 mm) 246 in (6,248 mm) Hybrid: 230.2 in (5,847 mm)
    Width	78.5 in (1,994 mm)
    Height	74 in (1,880 mm) 77 in (1,956 mm) Hybrid 2WD: 71.2 in (1,808 mm) Hybrid 4WD: 73.9 in (1,877 mm)

    The GMT800 Silverado/Sierra 1500 (light pickup trucks) were released in 1998 as 1999 models. The “classic” light-duty GMT400 C/K trucks were continued in production for that first year alongside the new models, and the Heavy-Duty GMT400 pickups (alongside the GMT400 SUVs) were continued through 2000, with the new GMT800 Silverado/Sierra HD (Heavy Duty) being introduced. A small refresh was introduced in 2002, bringing slight design changes and an upgrade to the audio and HVAC controls.

    Body style changes

    There was a midyear body style change in 2007; during this change, the first generation ends and the second generation begins. This body style is referred to as “Classic”; the second generation is referred to as the “New body style”

    Light duty

    There are a number of models of light-duty Silverados and Sierras, including the half-ton, SS, and Hybrid.

    The light-duty trucks generally use the 1500 name. They are available in three cab lengths, 2-door standard/regular cab, 4-door extended cab, and front-hinged 4-door crew cab Three cargo beds are available, including a 69.2 in (1,758 mm) short box, 78.7 in (1,999 mm) standard box, and a 97.6 in (2,479 mm) long box. The short box is only available with the extended or crew cab, and is the only option on the latter. The new trucks used a new hydro-formed technology on the frame which GM pioneered from the Corvette and was designed to add strength and take away mass and was later used by Ford and Dodge Ram.

    For the first year, only the regular cab and 3-door extended cab were available, along with the Vortec 4300 V6, Vortec 4800 V8, and the Vortec 5300 V8. A 4-door extended cab was added for 2000, and output on the 5.3 L engine increased to 285 hp (213 kW) and 325 lb·ft (441 N·m).

    The 6.0 L Vortec 6000 V8 was added for the 2001 Heavy Duty models, rated at 300 hp (224 kW), with the GMC Sierra 1500 C3 getting an uprated 25 hp (19 kW) version of this engine. The Silverado Z71 got an optional lighter composite box, with a suspension package for towing, but lacked the high-output engine. The C3 became the Denali for 2002, and Quadrasteer was added.

    GM introducing a reworked version of the Silverado/Sierra in 2003, with a new front end, and a slightly updated rear end. In 2006 the Silverado received another facelift, similar to the HD version introduced in 2005 HD models. In addition to that, Chevrolet has deleted the “Chevrolet” badge off the tailgate that was used from 1999-2005. Its SUV counterparts retained the use of the pre-facelift sheetmetal.

    The Insurance Institute for Highway Safety (IIHS) gave the Silverado an overall “marginal” score on the frontal offset crash test for poor structural integrity and poor dummy control, although no injuries were recorded on the dummy’s body regions.

    2001 GMC Sierra C3/Denali

    

     Sierra Denali with Quadrasteer

    GMC created an upscale version of its Sierra 1500 in 2000 called the Sierra C3. It used all-wheel drive with a 3.73 final drive gear ratio and included the 6.0 L Vortec 6000 LQ4 V8 rated at 325 hp (242 kW) at 5000 rpm and 370 lb•ft (502 N·m) of torque at 4000 rpm coupled to a 4L60E-HD four speed automatic transmission along with other upscale equipment. For 2002, the name was changed to Sierra Denali, but the specifications remained essentially the same except for the addition of Quadrasteer and GM changed from the 4L60E-HD to the 4L65E in conjunction with a 4.10 final drive gear ratio.

    The Denali is rated for towing 9,100 pounds (4,100 kg) and hauling 1,595 pounds (723 kg) in the cargo box.

    The Sierra Denali was initially equipped with Delphi‘s Quadrasteer system as standard equipment. It was a 4-wheel steering system that greatly reduced the truck’s turning radius and improved lane changing while towing. General Motors dropped Quadrasteer from the Sierra Denali after the 2004 model year and its entire lineup after 2005 due to poor sales of this expensive option.

    For the ’07 model year, the Sierra Denali shares the same billet grille from the other Denali models, and also has the same dash as the ’07 SUV’s. The ’07 Sierra Denali was initially the only half ton pickup that had a 6.2 liter with 403 hp (301 kW) and 417 lb·ft (565 N·m) of torque coupled to a six speed transmission. This truck is also an optional all wheel drive vehicle and goes 0-60 mph in 6.3 seconds.

    Chevrolet Silverado SS

    

     Silverado SS

    Launched in early 2003, the Silverado SS is a high-performance pickup truck built by Chevrolet. It is based on the 1500 Silverado with upgrades in drive train and both exterior and interior appearance. It was equipped standard with the 6.0 liter Vortec High-Output V8 rated at 345 hp (257 kW) at 5200 rpm and 380 lb·ft (515 N·m) of torque at 4000 rpm coupled to a 4L65E four speed automatic transmission. This was the same engine used for the second generation Cadillac Escalade. Chevrolet and GMC advertised this engine as the Vortec High Output and later as the “VortecMAX”, while Cadillac calls it the “HO 6000”. The SS debuted in 2003 with a standard All Wheel Drive setup with a 4.10 final drive gear ratio and 4 wheel disc brakes. In 2005, in an attempt to increase sales, a 2-wheel drive version became available (the 2WD SS also lost its rear disc brakes in favor of drums, as did the rest of the 1/2-ton GMT800s). 2005 was also the first year the sun roof was available in the SS line up. In 2006, the AWD variant was dropped and the rear wheel drive was the only driveline layout available. In a further effort to reduce cost, you could also get cloth interior and/ or bench seat. The Silverado SS also comes with the Z60 performance suspension and 20 inch aluminum wheels. All the SS trucks in both 2 wheel drive and AWD used the torsion bar style front suspension for better handling. It should also be noted the SS themed trucks were only available from the factory in Black Onyx, Victory Red, and Arrival Blue Metallic from 2003 to 2004. In 2005 Arrival Blue Metallic was dropped from the color choice and replaced with Silver Birch Metallic.

    Intimidator SS

    In 2006, Chevrolet released a special edition Silverado SS under the name “Intimidator SS” (licensed by Dale Earnhardt Inc.) to honor the late Dale Earnhardt. The truck came with several minor appearance upgrades (rear spoiler, embroidered headrests, Intimidator custom badging), but was essentially just a regular Silverado SS. Of the 1,033 scheduled trucks, only 933 were made (the remaining 100 were sold as 2007 Silverado SS “classic” bodystyle trucks before the 2007.5 MY changeover. These trucks were only available in Black Onyx exterior but could be ordered with cloth or leather interior. Also features

    Silverado Performance Edition/Vortec Max

    

     2004 GMC Sierra with VHO package

    The Silverado Performance Edition option (also known as the VHO by some enthusiasts) was first introduced in 2004 to a limited market (mainly consisting of Texas and several surrounding areas); it was available nationwide for MY 2005-07. The SPE package (under option code B4V) included several options previously not found on the standard 1500 model, most notably the LQ9 6.0 L V-8 engine (the same used for the Silverado SS, the 2005-2006 GMC Denalis and the Cadillac Escalade). The LQ9 motor was rated at 345 hp (257 kW) at 5200 rpm and 380 lb·ft (515 N·m) of torque at 4000 rpm, which was the same specifications shared in the SS models. The B4V package could only be ordered on extended cab standard box 2WD trucks. They were all built at the Canadian assembly plant and were equipped with the Z60 High Performance suspension package, in addition to the M32 = 4L65E transmission, GT4 = 3.73 rear gear, and G80 Gov Lock as standard equipment. The 2004 models were equipped with the standard 10 bolt 8.625 rear end. The 2005 models were upgraded with the larger 14 bolt 9.5 rear end under RPO option AXN. The package also included one style of the newly introduced GM 20 inch wheels installed from the factory. This marked the first time the LQ9 engine was available for a two-wheel drive application. Unlike the SS Package you could order the interior combination in anything from basic cloth to fully loaded. There were also more color options available with this package.

    For the 2006 model year, the Vortec Max package (option code NHT) was added to the options list with an array of similar features and new badges. However, the Vortec Max package differed in that it came with a variant of the Z85 Handling/Trailering suspension, as well as 17-inch wheels and tires versus the Z60 High Performance Suspension and 20-inch wheel and tire package of the Performance Edition. This was because the Vortec Max package was intended for max trailer towing, while the Performance Edition was intended more for customers who wanted the Silverado SS mechanicals without the visuals of the SS. It was also made available (in addition to the extended cab) in the light duty 4 door crew cab models. For the first time it was also available in 2 wheel drive or 4 wheel drive on both the Silverados and Sierras, with or without Z71 packages.

    The newest Vortec Max Performance package introduced in 2007 on the GMT900 includes a 10,800 pounds towing capacity.

    Hybrid

    

     The engine compartment of a 2006 GMC Sierra Hybrid

    GM launched a hybrid version of the Silverado/Sierra in 2004, becoming the first ever GM hybrid passenger vehicle. Known within GM as the Parallel Hybrid Truck or PHT it is not actually a parallel hybrid by the current definition, but a type of micro hybrid design. The electric motor housed within the transmission flywheel housing, serves only to provide engine cranking/starting, battery charging, and powering accessories. The engine automatically shuts down as the truck comes to a stop and uses 42 Volt electric power to the starter/generator unit to restart the engine as the brake pedal is released. Besides the typical 12 V automotive battery the PHT uses three additional 12 V valve regulated lead acid (VRLA) batteries mounted under the rear seat to store and provide power. The truck uses a 5.3 L Vortec 5300 V8 for primary propulsion power. These trucks were also purchased back from customers for more than what they were worth in the late 2000s.

    The PHT features four 120 volt 20 amp AC outlets, two in the bed and two inside the cab under the rear seat. These are particularly interesting to the building/construction contractor market, since they often require AC power when on the job. Additionally, the extra reserves of power for the accessories make this truck well-suited to that market, where trucks often sit at idle for hours at a time.

    Availability was extremely limited at first, with commercial buyers getting the first allotment. Later in 2005, the truck was offered at retail in Alaska, California, Florida, Nevada, Oregon, Washington and Canada. For 2006-07 the truck was generally available to retail buyers throughout North America. The Parallel Hybrid Truck was discontinued for the 2008 model year with the release of the GMT900 truck line. Starting in 2009, General Motors offers a second generation Chevrolet Silverado and GMC Sierra equipped with a Two-Mode Hybrid powertrain and 4-speed CVT.

    Heavy duty

    GMT800 Heavy Duty
    Overview
    Production	2000–2007
    Body and chassis
    Platform	GM GMT880 platform
    Powertrain
    Engine	6.0 L Vortec 6000 V8 8.1 L Vortec 8100 V8 6.6 L Duramax V8
    Transmission	4-speed 4L80-E automatic 5-speed Allison 1000 automatic(2000–2005) 6-speed Allison 1000 automatic(2005–2007) 5-speed NV4500 manual (2000–2007 6.0) 6-speed ZF S6-650 manual (2000–2006 6.6 and 8.1)
    Dimensions
    Wheelbase	133 in (3,378 mm) 143.5 in (3,645 mm) 157.5 in (4,000 mm) 167 in (4,242 mm) 153 in (3,886 mm)
    Length	222.1 in (5,641 mm) 227.7 in (5,784 mm) 246.6 in (6,264 mm) 237.2 in (6,025 mm) 256.1 in (6,505 mm)
    Width	SRW: 79.7 in (2,024 mm) DRW: 96.1 in (2,441 mm)
    Height	76.0-77.4 in (1,930-1,966 mm)

    

     2004 Chevrolet Silverado 2500 HD in the Netherlands

    The HD variant is a heavy-duty light truck. It is a strengthened version of the Silverado/Sierra light-duty, and is available in the 1500HD, 2500HD, and 3500 models. The 1500HD, introduced in 2000, offers a Vortec 6000 V8 with 300 hp (224 kW) at 5200 rpm and 360 lb·ft (488 N·m) of torque at 4000 rpm with a Hydra-Matic 4L80E four-speed automatic transmission. The 2500HD also offers either the LB7 Duramax V8 with 300 hp (224 kW) at 3100 rpm and 520 lb·ft (705 N·m) of torque at 1800 rpm, the LLY Duramax V8 with 310 hp (231 kW) @ 3000RPM and 605 lb·ft (820 N·m) @ 1600RPM, and the LBZ Duramax V8 with 360 hp (268 kW) @ 3200RPM and 650 lb·ft (881 N·m) @ 1600RPM. Also available is the Vortec 8100 V8 with 340 hp (254 kW) at 4200 rpm and 455 lb·ft (617 N·m) of torque at 3200 rpm.

    The 2500HD has an available five-speed (six-speed for 2006-2007 models) Allison 1000 transmission with the Vortec 8100 and Duramax 6.6. The Silverado 3500 offers the same engine/transmission features that the 2500HD does, however it is usually equipped with “dually” twin wheels at the rear and has a stronger suspension. The HD models are primarily used for towing and high-weight cargo.

    Towing capacity for the 1500HD is rated at 10,300 pounds (4,700 kg), and can haul 3,129 pounds (1,419 kg) in the bed. The 2500HD ups these ratings to 16,300 pounds (7,400 kg) with the 8.1 liter engine or 10,600 pounds (4,800 kg) with the 6.0 liter engine, and 4,058 pounds (1,841 kg), while the 3500 can tow 16,700 pounds (7,600 kg) and haul 5,511 pounds (2,500 kg). The addition of 4 wheel drive tends to reduce the towing and carrying capacity by 200 to 400 lb (181 kg), depending upon year and model. Other factors, such as options, can also affect these numbers.

    Engines

    Model	Year	Engine	Power	Torque
    1500	1998–2003	4.3 L Vortec 4300 V6	200 hp (149 kW) @ 4600 RPM	260 lb·ft (353 N·m) @ 2800 RPM
    	2004–2006		195 hp (145 kW) @ 4600 RPM	260 lb·ft (353 N·m) @ 2800 RPM
    	1998–2001	4.8 L Vortec 4800 V8	270 hp (201 kW) @ 5200 RPM	285 lb·ft (386 N·m) @ 4000 RPM
    	2001–2002		275 hp (205 kW) @ 5200 RPM	285 lb·ft (386 N·m) @ 4000 RPM
    	2002–2003		270 hp (201 kW) @ 5200 RPM	285 lb·ft (386 N·m) @ 4000 RPM
    	2004–2006		285 hp (213 kW) @ 5200 RPM	295 lb·ft (400 N·m) @ 4000 RPM
    	1998–2003	5.3 L Vortec 5300 V8	285 hp (213 kW) @ 5200 RPM	325 lb·ft (441 N·m) @ 4000 RPM
    	2003–2004		295 hp (220 kW) @ 5200 RPM	330 lb·ft (447 N·m) @ 4000 RPM
    	2004–2006		295 hp (220 kW) @ 5200 RPM	335 lb·ft (454 N·m) @ 4000 RPM
    1500HD/2500HD/3500HD	2000-2006	6.0 L Vortec 6000 V8	300 hp (224 kW) @ 4400 RPM	360 lb·ft (488 N·m) @ 4000 RPM
    	2000–2004	8.1 L Vortec 8100 V8	340 hp (254 kW) @ 4200 RPM	455 lb·ft (617 N·m) @ 3200 RPM
    	2004–2006		330 hp (246 kW) @ 4200 RPM	450 lb·ft (610 N·m) @ 3200 RPM
    	2001–2002 w/ LQY		270 hp (201 kW) @ 3600 RPM	400 lb·ft (542 N·m) @ 1600 RPM
    	2001–2002 w/ LQQ		210 hp (157 kW) @ 3600 RPM	325 lb·ft (441 N·m) @ 1200 RPM
    	2002–2005 w/ LRW		325 hp (242 kW) @ 4000 RPM	450 lb·ft (610 N·m) @ 2800 RPM
    	2002–2006 w/ LRZ		295 hp (220 kW) @ 3600 RPM	440 lb·ft (597 N·m) @ 3200 RPM
    	2002–2006 w/ LQR		225 hp (168 kW) @ 3600 RPM	350 lb·ft (475 N·m) @ 1200 RPM
    	2000–2004	6.6 L DuraMAX (LB7/LLY) V8	300 hp (224 kW) @ 3100 RPM	520 lb·ft (705 N·m) @ 1800 RPM
    	2005-2006 w/ MTX		300 hp (224 kW) @ 3000 RPM	520 lb·ft (705 N·m) @ 1800 RPM
    	2005-2006 w/ ATX		310 hp (231 kW) @ 3000 RPM	605 lb·ft (820 N·m) @ 1600 RPM
    	2005-2006	6.6 L DuraMAX (LBZ) V8	360 hp (268 kW) @ 3200 RPM	650 lb·ft (881 N·m) @ 1600 RPM
    GMC Sierra C3	2000-2001	6.0 L Vortec 6000 V8	325 hp (242 kW) @ 5000 RPM	370 lb·ft (502 N·m) @ 4000 RPM
    GMC Sierra Denali	2002–2004
    	2004–2006	6.0 L Vortec 6000 V8	345 hp (257 kW) @ 5200 RPM	380 lb·ft (515 N·m) @ 4000 RPM
    Chevrolet Silverado SS	2002–2006
    Chevrolet Silverado Vortec High Output	2003–2005
    Chevrolet Silverado VortecMAX	2005-2006

    • 

      1998–2002 Chevrolet Silverado 2500 regular cab

    • 

      2002–2006 Chevrolet Silverado 3500 crew cab

    • 

      The Allison 1000 attached to the 6.6L Duramax Diesel

    Second generation (2007–2013)

    Second generation
    Overview
    Also called	Chevrolet Platform/Shakebody GMC Dump Truck
    Production	2006–2013
    Body and chassis
    Platform	GM GMT900 platform: GMT901 (Chevrolet Silverado) GMT902 (GMC Sierra)
    Powertrain
    Engine	4.3 L V6 195 hp (145 kW) 4.8 L V8 295 hp (220 kW) 5.3 L V8 315 hp (235 kW) 6.0 L V8 360 hp (268 kW) 6.2 L V8 403 hp (301 kW)
    Transmission	4-speed 4L60-E automatic 4-speed “2-Mode Hybrid transmission” CVT (Hybrid) 6-speed 6L80 automatic
    Dimensions
    Wheelbase	Regular: 119 in (3,023 mm) Extended & Crew: 143.5 in (3,645 mm)
    Length	Regular: 205.6 in (5,222 mm) Extended & Crew: 230.2 in (5,847 mm) Hybrid: 229.9 in (5,839 mm)
    Width	Regular & Extended: 79.9 in (2,029 mm) Crew: 80 in (2,032 mm)
    Height	Regular & Extended: 73.9 in (1,877 mm) Crew: 73.8 in (1,875 mm) Hybrid 4WD: 73.7 in (1,872 mm)

    The all-new GMT900 generation of the Silverado/Sierra arrived in the last quarter of 2006 as a 2007 model. It features a redesigned exterior, interior, frame, and suspension as well as a power increases on certain engines. It takes styling cues from the 2007 GMT900 SUVs and the Chevrolet Colorado pickups. Like the GMT900 SUVs, these pickups also have greatly improved aerodynamics over their predecessors like steeply raked windshields and tighter panel gaps which improve fuel economy. The GMT800 models were continued through 2007 badged as “Classic”, just as the GMT400 models continued for two years after the GMT800’s introduction.

    

     2008 GMC Sierra crew cab

    The new Silverado earned the North American Truck of the Year award for 2007 and was Motor Trend magazine’s Truck of the Year for 2007. Like its predecessors, the new Silverado offers buyers a choice of two door regular cabs, four door extended cabs (with rear doors that now open 170 degrees similar to the Nissan Titan) and four door crew cabs with the rear doors opening in the same direction as the front doors. GM also offers the trucks in the traditional two and four wheel drive configurations.

    The Generation III small block V8 engines offered in the GMT 800 trucks were replaced in the GMT 900 series by the Generation IV small block V8 engine family, featuring upgrades such as increased power and Active Fuel Management on the 5.3 L and 6.0 L V8s. A new high performance 6.2 liter V8 (with 403 hp (301 kW) and 417 lb·ft (565 N·m) of torque) was introduced with the 2007 Cadillac Escalade and 2007 GMC Denali line, and is now available on the Silverado LTZ trim line. After skipping the 2008 model year, with 2007 being the last for the GMT800 hybrid line, a two-mode hybrid model was introduced in late 2008 as a 2009 model. Available in either two- or four-wheel-drive, the Sierra 1500 Hybrid is powered by a 6.0-liter V8. It’s joined by two 60-kilowatt electric motors supplied by a nickel-metal hydride battery pack under the rear seat. On its own, the V8 is rated at 332 horsepower and 367 pound-feet of torque. GM engineers say that combined output with the electric motors is 379 hp. The unique transmission houses the electric motors along with three different planetary gear sets and four traditional clutches.

    There are two dash options offered in the new Silverado and Sierra. A luxury-inspired dash that closely mimics the dash in their GMT900 SUVs, and a “pickup” dash that is more upright to make way for a passenger seat in place of a center console.

    As of 2008, General Motors full size trucks are no longer sold in United States and Canada with manual transmissions, they are only offered in Mexico in the Silverado 1500 V6 engine and Silverado 3500.

    All Silverado & Sierra 1/2 ton models received a revised bumper and shortened front fascia mid-way through the 2009 model year and a full mid-cycle refresh followed with all 2010 models, including new interior door panels (which moved the handle forward and added an additional cup holder) and a six-speed automatic transmission on regular and extended cab models with 5.3L or larger V8’s was also made standard. Two new exterior colors were added: Taupe Gray Metallic and Sheer Silver Metallic.

    • 

      2007 GMC Sierra Denali

    • 

      Chevrolet Silverado Hybrid

    • 

      2009 GMC Sierra Hybrid

    • 

      2012 Chevrolet Silverado 1500 LTZ extended cab

    • 

      2013 GMC Sierra Denali Crew Cab

    GMT900 Heavy Duty
    Overview
    Production	2006–2014
    Body and chassis
    Platform	GM GMT910 platform: GMT911 (Chevrolet Silverado) GMT912 (GMC Sierra)
    Powertrain
    Engine	6.0 L V8 360 hp (268 kW)6.6 L Duramax diesel V8 397 hp (296 kW)
    Transmission	6-speed 6L90 automatic 6-speed Allison 1000 automatic
    Dimensions
    Wheelbase	Varies greatly
    Length	Varies greatly
    Width	80 in (2,032 mm) 95.9 in (2,436 mm) (Towing mirrors)
    Height	76 in (1,930 mm)

    The 8.1 L big-block V8 is no longer offered on the Heavy Duty models, and no replacement has been announced. The 6L90 6-speed automatic transmission is standard in all Heavy Duty models. The Allison 1000 transmission is paired with the optional Duramax V8 diesel.

    As of 2011 the GMC and Chevrolet heavy Duty’s have being upgraded with a new fully boxed high strength steel frame from front to rear improving stiffness by 92% with bigger rear springs, larger engine and transmission mounts and new hydraulic body mounts to improve the ride.The front suspension incorporates new upper and lower control arms and new torsion bars tailored to one of five different gross axle weight ratings. Upper control arms are constructed from forged steel that is both stronger and lighter than the previous arms, while the new lower arms are cast iron to maximize load capacity. Using a unique torsion bar for each gross weight rating allows for better control over vehicle height, resulting in improved handling and better alignment for reduced tire wear. These improvements allow for up to a 6,000 pound front axle weight rating, allowing all 4wd trucks to accommodate a snow plow. Additional front suspension enhancements come from new urethane bump stops, two per side. The upper shock mount has been changed from a single stem mount to a two-bolt design to eliminate the possibility of squeaks and thumps. The rear suspension design uses asymmetrical leaf springs that are wider and capable of greater load handling. The design features 3-inch wide leaves, with front and rear spring sections of different lengths to reduce the twisting that can result in axle hop and loss of traction. The 2500HD use a two-stage design with a rating of 6,200 lbs, and 3500HD models have a three-stage design with 7,050 lb and 9,375 lb ratings on single and dual-wheel models respectively

    • 

      2012 Chevrolet Silverado 2500HD crew cab

    • 

      2012 GMC Sierra Denali HD

    • 

      2008 GMC Sierra 3500HD SLT crew cab

    • 

      2012 Chevrolet Silverado 3500HD crew cab

    Engines

    Model	Year	Engine	Power	Torque
    1500	2007-2013	4.3 L Vortec 4300 V6	195 hp (145 kW) @ 4600 RPM	260 lb·ft (353 N·m) @ 2800 RPM
    	2007-2008	4.8 L Vortec 4800 V8	295 hp (220 kW) @ 5600 RPM	305 lb·ft (414 N·m) @ 4800 RPM
    	2009		295 hp (220 kW) @ 5600 RPM	305 lb·ft (414 N·m) @ 4600 RPM
    	2010-2013		302 hp (225 kW) @ 5600 RPM	305 lb·ft (414 N·m) @ 4600 RPM
    	2007-2009	5.3 L Vortec 5300 V8	315 hp (235 kW) @ 5200 RPM	338 lb·ft (458 N·m) @ 4400 RPM
    	2010-2013		315 hp (235 kW) @ 5300 RPM	335 lb·ft (454 N·m) @ 4400 RPM
    	2007-2008	6.0 L Vortec 6000 V8	367 hp (274 kW) @ 5500 RPM	375 lb·ft (508 N·m) @ 4300 RPM
    	2009		367 hp (274 kW) @ 5600 RPM	375 lb·ft (508 N·m) @ 4300 RPM
    	2009-2013	6.2 L Vortec 6200 V8	403 hp (301 kW) @ 5700 RPM	417 lb·ft (565 N·m) @ 4300 RPM
    2500HD/3500HD	2007-2008	6.0 L Vortec 6000 V8	353 hp (263 kW) @ 5400 RPM	373 lb·ft (506 N·m) @ 4400 RPM
    	2009-2013		360 hp (268 kW) @ 5400 RPM	380 lb·ft (515 N·m) @ 4200 RPM
    	2007-2010	6.6 L DuraMAX V8	365 hp (272 kW) @ 3200 RPM	660 lb·ft (895 N·m) @ 1600 RPM
    	2011-2013		397 hp (296 kW) @ 3000 RPM	765 lb·ft (1,037 N·m) @ 1600 RPM
    Silverado XFE	2009	6.0 L Vortec 6000 V8	332 hp (248 kW) @ 5100 RPM	367 lb·ft (498 N·m) @ 4100 RPM
    Silverado Hybrid	2009-2013

    Production location switch

    For the 2011 model year of the Silverado/Sierra, the production of crew cab models partially will shift from Silao, Mexico to Flint, Michigan.

    Safety

    The Silverado comes standard with four-wheel ABS. StabiliTrak and side curtain airbags are optional on certain trim levels.

    2007 NHTSA crash test:

    • Frontal Driver:
    • Frontal Passenger:
    • Side Driver:
    • Side Rear Passenger:
    • Rollover:

    The IIHS gave the Silverado a “Good” score in their frontal crash test, however 2007-09 models equipped with or without optional side curtain airbags received a “Poor” rating in the side impact test. For 2010 models the side structure was strengthened, side torso air bags were added, and side airbags became standard, with the upgrades the IIHS side impact overall rating improved to “Acceptable”, while the overall side structure rating is improved from “Poor” to “Acceptable”. The crew cab variant of the 2011-13 Silverado is also rated “Marginal” in the IIHS roof strength test.

    Electric version

    In 2011 developer of the Chevrolet Volt and former vice chairman Bob Lutz joined VIA Motors in developing electric versions of the Chevrolet Silverado/GMC Sierra called VIA VTrux.

    • 

      2013 VIA VTRUX

    Third generation (2014–present)

    Third generation
    Overview
    Also called	GMC Sierra VIA Vtrux Truck
    Production	2013–present
    Body and chassis
    Platform	GMT K2XX
    Powertrain
    Engine	LV3 EcoTec3 4.3 L V6 285 hp (213 kW) L83 EcoTec3 5.3 L V8 355 hp (265 kW) L86 EcoTec3 6.2 L V8 420 hp (313 kW)LY6 Vortec 6000 6.0 L V8 360 hp (268 kW) LML Duramax 6.6 L V8 397 hp (296 kW)
    Transmission	6-speed 6L80 automatic 8-speed 8L90 automatic
    Dimensions
    Wheelbase	Regular 6’6″: 119 in (3,023 mm) Regular 8′: 133 in (3,378 mm) Double 6’6″ & Crew 5’5″: 143.5 in (3,645 mm) Crew 6’6″: 153 in (3,886 mm)
    Length	Regular 6’6″: 205.6 in (5,222 mm) Regular 8′: 224.4 in (5,700 mm) Double & Crew 5’5″: 230 in (5,842 mm) Crew 6’6″: 239.6 in (6,086 mm)
    Width	80 in (2,032 mm)
    Height	73.5 in (1,867 mm) – 74.2 in (1,885 mm)

    

     2014 Silverado LTZ Crew Cab 4×4

    On December 13, 2012, the redesigned 2014 Chevrolet Silverado, along with the related 2014 GMC Sierra were introduced in Detroit, Michigan at the North American International Auto Show. GM dropped the GMT and changed to K2XX. The new Silverado 1500 has three gas engine options: 4.3 L EcoTec3 V6, 5.3 L EcoTec3 V8, or 6.2 L EcoTec3 V8. Chevrolet’s MyLink touch-screen multimedia interface system will be available on most models. It will have A2DP stereo streaming technologies, Bluetooth hands-free telephone, USB hookups, and an input for an Apple iPod or iPhone. When connected via the USB port, an iPhone 4/4S, iPhone 5/iPhone 5S, iPhone 6, or iPhone 6 Plus will be able to stream music from Pandora Radio. A Bose premium audio system, as well as a Bose surround sound audio system will be available on most models. OnStar will be standard on all models. Underneath the new Silverado will benefit from a new fully boxed high strength steel frame with hydroforming technology, and the truck cab’s frame will be built with high strength steel as well. The new Silverado also will benefit from the use of aluminum on the hood, for the engine block and for the control arms in order to save mass. The truck’s bed will be made of roll-formed steel instead of stamped steel used by other manufacturers in order to save weight and gain strength. The 2014 Silverado will offer a new luxury model the High Country edition which includes saddle brown leather interior and the edition will be Chevrolet’s first entry into the luxury market. A revised front end features styling cues from the 1980s-era Chevrolet C-Series Trucks, and, on Z-71 models, a Z-71 badge was added to the front grille. Production of the Silverado began on April 29, 2013. The Silverado 1500 went on sale in May 2013 as a 2014 model, with the Silverado HD Series being available in early 2014 for the 2015 model year. On January 10, 2014 a recall was issued for 370,000 Silverado and Sierra pickups due to a fire risk.

    A rebadged version of the Silverado called the Chevrolet Cheyenne is sold in Mexico.

    The new American model version of the 2014 Chevrolet Silverado 1500/2500/3500HD and the 2015 Chevrolet Silverado High Country will be introduced to the Philippines market by Chevrolet Motorama Show late November 2014 as a MY2015, along with the MY2015 Chevrolet Suburban, 2015 Chevrolet Tahoe, 2015 Chevrolet Impala, 2015 Chevrolet Express Van and the new American model version are 2015 Chevrolet Traxand 2015 Chevrolet Colorado.

    On January 14, 2014, The Silverado, along with the Chevrolet Corvette Stingray, received the 2014 North American International Auto Show’s Car and Truck of the Year awards.

    For the 2015 model year, the 6.2L Ecotec3 was paired with the new 8-speed 8L90 transmission, offering a wider ratio spread with more closely spaced gears, quicker shifts, and improved acceleration and fuel economy.

    Engines

    Model	Year	Engine	Power	Torque
    1500	2014-	4.3 L LV3 GM EcoTec3 4300 V6	285 hp (213 kW) @ 5300 RPM	305 lb·ft (414 N·m) @ 3900 RPM
    	2014-	5.3 L L83 GM EcoTec3 5300 V8	355 hp (265 kW) @ 5600 RPM	383 lb·ft (519 N·m) @ 4100 RPM
    	2014-	6.2 L L86 GM EcoTec3 6200 V8	420 hp (313 kW) @ 5600 RPM	460 lb·ft (624 N·m) @ 4100 RPM
    2500HD/3500HD	2014-	6.0 L LY6 Vortec 6000 V8	360 hp (268 kW) @ 5400 RPM	380 lb·ft (515 N·m) @ 4400 RPM
    	2014-	6.6 L LML Duramax V8	397 hp (296 kW) @ 3200 RPM	765 lb·ft (1,037 N·m) @ 1600 RPM

    Model Year 2019

    General Motors is rushing its next-generation full-size pickup trucks “T1XX” development program to compete with Ford Motor Company’s next-generation “P552” 2015 F150 pickup truck. Scheduled for a late 2018 launch, they will be all-new for model year 2019, at 9 months ahead of the originally scheduled 2019 launch.

    Military applications

    LSSV
    Overview
    Manufacturer	General Motors, AM General
    Model years	2001–
    Body and chassis
    Body style	2-door SUV 4-door SUV 2-door pickup 4-door pickup
    Platform	GM GMT880 platform
    Powertrain
    Engine	6.6 L Duramax V8
    Transmission	4-speed 4L80-E automatic 5-speed Allison 1000 automatic
    Dimensions
    Width	79.9 in (2.03 m)
    Height	74.5 in (1.89 m)

    When production of the CUCV II ended in 2000, GM redesigned it to coincide with civilian truck offerings. The CUCV nomeclature was changed to Light Service Support Vehicle in 2001. In 2005, LSSV production switched to AM General, a unit of MacAndrews and Forbes Holdings. The LSSV is a GM-built Chevrolet Silverado 1500, Chevrolet Silverado 2500 HD, Chevrolet Tahoe, or Chevrolet Suburban that is powered by a Duramax 6.6 liter turbo diesel engine. The various Silverados, Tahoes, and Suburbans that are used provide numerous platforms for different kinds of vehicles. As GM has redesigned its civilian trucks and SUVs from 2001–present, LSSVs have also been updated cosmetically.

    The Militarization of standard GM trucks/SUVs to become LSSVs includes exterior changes such as CARC paint (Forest Green, Desert Sand, or 3-color Camouflage), blackout lights, military bumpers, a brush guard, a NATO slave receptacle/NATO trailer receptacle, a pintle hook and tow shackles. The electrical system is changed to the 24/12 volt military standard. The dashboard has additional controls and dataplates. The truck also can be equipped with weapon supports in the cab, cargo tie down hooks, folding troop seats, pioneer tools, winches, and other military accessories.

    The Enhanced Mobility Package (EMP) option adds enhanced suspension, 4-wheel anti-lock brakes, a locking differential, on/off road beadlock tires, a tire pressure monitoring system and other upgrades.About 2,000 LSSV units were sold to U.S. and international military and law enforcement organizations.

    Variants

    • Cargo/Troop Carrier