The Superlift 2.5-inch block kit for 1999–2010 Chevy Silverado and GMC Sierra 1500 and 2500 4WD applications provides a 2.5-inch rear lift using cast iron blocks designed for these Silverado and Sierra 4WD rear-axle setups. Included are two cast iron blocks, four U-bolts and all nuts and washers needed for installation, and the kit is covered by a limited lifetime warranty.
Superlift 99-10 Chevy Silv/GMC Sierra 1500/2500 4WD 2.5in Block Kit