The Detroit Diesel 6.5L Turbo Diesel (RPO: L65 and L56) was GM’s primary light-duty diesel engine throughout the GMT400 era. Introduced in 1992 as an evolution of the earlier 6.2L diesel, the 6.5L added displacement and turbocharging to improve power, drivability, and towing performance. While it was never intended to…
Category: Engines
Information, identification, and specifications for the factory installed engines in 1988-2000 Chevrolet/GMC Pickups and SUV’s (GMT400) .
1996
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Vortec 5.7 L31 : The Last of the Classic Small-Block Chevy
The Vortec 5700 L31 stands as a milestone in Chevrolet truck engine history: the final incarnation of the original small-block Chevy V8 family that began in 1955. While the ubiquitous 350 V8 had powered Chevy trucks, vans, and SUVs for decades, the L31 represents the pinnacle of that long-lived design before GM…
1996
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L29 454 : Modernized Big Block
Also known as the Vortec 7400, the L29 was the final and most modern iteration of the venerable big block Chevy. It was available from 1996 to 2000 in 2500/3500/3500HD trucks and 2500 Suburbans. Factory power rating was 290 HP at 4000rpm and torque was 410 ft-lbs at 3200rpm.
1988
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L19 454 : Big Block Workhorse
The L19 was available from 1988 to 1995 in 2500 and 3500 trucks, and also in the 1990-1993 SS454 C1500. The general specifications remained very similar for its entire run, other than a block redesign to to new Mark V architecture in 1991.