1982-93: Chevro­let and GMC Light Trucks and SUVS

Diesel World - - Vintage Smoke -

GM in­tro­duced the 6.2L V8 diesel into 1982 model year Chevro­let and GMC trucks and SUVS. De­vel­oped by Detroit Diesel, then still a GM sub­sidiary, the light-duty, in­di­rect­in­jected (IDI) diesel en­gine was a ground-up de­vel­op­ment for trucks with no more than a 10,000 GCVWR. The 6.2L had no di­rect roots to the ill-fated 5.7L/350 Olds V8 diesel of­fered in ear­lier GM prod­ucts. The GCVWR would be bumped a lit­tle later. The early emis­sions en­gines were gen­er­ally seen at 130 hp with 240 lb-ft. Non-emis­sions ver­sions for higher GVW trucks could go a fair bit higher. Th­ese were great en­gines in the half-ton pickups and added a lot to the Blazer and Sub­ur­ban. In the three-quar­ter and one-tons, not so much. Be­ing NA meant they had to be flogged mer­ci­lessly with a heavy load. Re­li­a­bil­ity suf­fered and they de­liv­ered dis­ap­point­ing per­for­mance. In lighter ap­pli­ca­tions they were well-liked as be­ing eco­nom­i­cal and proved more durable. Again, cost cut­ting was the root of what­ever evil ex­isted in the 6.2L. GM later learned that the en­gines with af­ter­mar­ket turbo kits ac­tu­ally held up as well or bet­ter than the NA in hard use and of­fered much bet­ter per­for­mance. The 6.2L evolved into the 6.5L, most of which were tur­bocharged. While the 6.5L turbo diesel never equaled the com­peti­tors from Ford and Dodge in the ’93-2000 era, it set­tled in to be a good of­fer­ing, espe­cially in the half-ton lines. The 6.5L en­gine is still in pro­duc­tion, though not by GM.

DIS­PLACE­MENT: 6.2L (379 ci) POWER: 135 hp @ 3,600 rpm TORQUE: 240 lb-ft @ 2,000 rpm COM­PRES­SION RA­TIO: 21.5:1 AS­PI­RA­TION: Nat­u­ral

1983 Blazer diesel. 1988 Chevro­let half-ton diesel pickups.

1982 6.2L V8 diesel.

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