Enginetech 2004 GMC Sierra 3500 Parts

Looking to swap the venerable LS engine into your hot rod, muscle car, or classic truck? Take a look at our detailed identification guide for Gen III/IV LS engines before you hit the salvage yard or swap meet!

We show you how to keep that old GM transmission when swapping in an LS engine. Our LS swap adapter kits make it easy!

A quick review of the Performance Tool W41036 Deluxe Engine Leveler available at Speedway Motors.

In this budget build, a GM rear end is upgraded in order to hold 400+ HP. See how spherical bushings are replaced in a used 8.5” GM 10 bolt rear end.