1988-1998 Chevy Silverado / GMC Sierra 15002WD/4WD2'' Rear Block Kit. PN 9-9006Rugged Off Road 2 Inch rear block kit for 1988-1998 Chevy Silverado / GMC Sierra 15002wd and 4wd trucks. Provides either 2'' of rear lift for trucks without a factory rear block.Comes complete with vehicle specific u-bolts and hardware. Adds a nice rake for towing or hauling additional weight in the bed. Easy to install. Does not require any permanent modifications.