2004 GMC Sierra 2500 Engine 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!

Speedway Motors Product Manager Jeff K. talks about how to really make your engine bay stand out from the crowd with just a little patience, and some Speedway products.

Engine Cylinder Numbers

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.