Introduced in 1990 as a performance package for the C1500 shortbed regular cab pickup, the 454 SS borrowed many of the design elements from the available Sport Equipment Package and added the 7.4L big block V8 from the heavy duty trucks (along with a few other additions). Only available for 4 years, true examples they are relatively rare, but they are often copied. All true 454 SS trucks will be regular cab, shortbed, fleet side trucks with the RPO code B4U.
Category: 1990
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.
1988
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CUCV II : GMT400 joins the Military
A rarely seen model is the 1987-2001 CUCV II, the militarized version of the civilian GMT400 platform. Only purchased in small numbers by the US military (Only number I have found in my research is around 800 units), with over 3,000 ordered by other governments across the world.
The CUCV II was a modernization of the more well know “squarebody” CUCV. Based almost directly on the civilian version, only specific changes were made for military use. CUCV II’s were not inherently more heavy duty than what was available to everyone else from their local GM dealership.
1990
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1990 Model Specifications : SS454 Introduced
The 1990 model year featured a few exciting changes for the GMT400 Platform. The SS 454 package (RPO B4U) was released, combining the sport package with a host of performance upgrades including the L19 454 big block, 3.73 9.5″ rear differential, TH400 transmission, and suspension/steering upgrades.
1990
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1990 Chevrolet Pickup Dealer Info Sheet
Documents supplied to dealers for vehicle ordering.
Options, specifications, RPO codes.
Scan quality varies.
Excellent source of what was available from GM for 1990 model year.