4-Inch Rear Block and U-Bolt Kit for GM 2500 HD & 3500 HD

4-Inch Rear Block and U-Bolt Kit, fitment-checked

Rear blocks and U-bolts, nothing more — 4 in. blocks with the U-bolts to hold them. It covers a fifteen-year span of GM heavy duty: the Silverado and Sierra 2500 HD and 3500 HD from 2011 to 2025.

A simple, specific package: 4 in. rear blocks and the U-bolts that secure them. There is no front hardware here, so this raises the back of the truck and nothing else — pair it with a front kit if you are after a level result. Coverage is unusually long-lived, running the Chevrolet Silverado 2500 HD and 3500 HD and the GMC Sierra 2500 HD and 3500 HD from 2011 through 2025, with Silverado trims listed as WT, LT, LTZ and High Country. Boxed weight is 31.8 lb.