EIB3887520 / 3887.520 - Application Notes 2002-2006 Avalanche, Z66, V8, 2WD/4WD 2000-2006 Tahoe, V8, 2WD/4WD 2002-2006 Escalade, 2WD/4WD, V8, Incl EXT 2000-2006 Suburban 1500, V8, 2WD/4WD 2000-2006 Yukon XL (Inc Denali), V8, 2WD/4WD 2000-2006 Yukon (Inc Denali), V8, 2WD/4WD, Exc. QuadraSteer (Front adj. - Rear 3.0 in) NOTE: Premium Ride option rear shocks (3" Dia. shock housing) will have to be replaced with an OE or aftermarket shock to achieve full lowering. (Premium Ride shocks are internally self leveling)