Executive order

D-126-3

GM Service Parts Operations

Vehicle applications

No vehicle applications were preserved for this order.

Part records

Part numberModel/specificationModificationRemarks
1988-1995 trucks originally equipped with a GM 454 CID. (7.4L) gasoline engine.Cylinder bored to increase displacement from 7.4L to 8.2L and existing piston replaced with larger piston, ported and polished cylinder heads, and an increase in lift and duration on the camshaft. The stock mechanical fuel pump is removed and replaced by an electronic fuel pump.