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In a nomenclature revision, the 1500/2500/3500 payload series previously used by GMC was also adopted by Chevrolet (the Rounded-Line R/V series would do so for 1989). [8] At its launch, the new generation was offered in two cab configurations and three bed configurations; the extended cab was a first for GM full-size trucks.
A very rare option was GMC's DH478 "ToroFlow" 478-cubic-inch diesel V6, which was offered only in 1973. [62] [63] For 1980, diesel engines returned as an option with the introduction of Detroit Diesel's Fuel Pincher 8.2L V8. The Caterpillar 3208 10.4L V8 also became an option, as GM introduced the Chevrolet Kodiak/GMC TopKick. [63]
A four-cylinder diesel (Perkins 4236 3.8L) was introduced for 1978 in the D10 pickup. [4] For 1981, the engine line was reduced to two, with a 4.1L inline-six becoming offered in gasoline and ethanol-fuel versions (C-10 and A-10) and the Perkins 4236 (D10).
Above the 1-ton 30/3500 model ranges, the C-series truck (C=Conventional) served as a basis for medium-duty conventional trucks marketed by both Chevrolet and GMC. The model range was produced under three series: the 1 + 1 ⁄ 2 -ton C40 (GMC C4500) and two 2-ton trucks; the "light" C50 (GMC C5500) and "heavy" C60 (GMC C6500). [ 22 ]
6.2L fitted to a 1987 HMMWV. The original 6.2 L (379 cu in) diesel V8 was introduced in 1982 for the Chevrolet C/K and was produced until 1993. The 6.2L diesel emerged as a high-fuel-economy alternative to the V8 gasoline engine lineup, and achieved better mileage than Chevrolet's 4.3L V6 gasoline engine of the 1980s, at a time when the market was focused on power rather than efficiency.
This was the same engine used for the second-generation Cadillac Escalade and GMC Yukon Denali. Chevrolet and GMC advertised this engine as the "Vortec High Output" and later as the "VortecMAX," while Cadillac called it the "HO 6000." The SS came with a standard all-wheel drive setup with a 4.10 final drive gear ratio and 4-wheel disc brakes.
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