1999-2006 GMC Sierra 1500 2WD. 1999-2006 Silverado 1500 2WD. 2007 Classic GMC Sierra 1500 2WD. 2007 Classic Silverado 1500 2WD. 2" Front Leveling Lift Kit. CNC Processing leveling kit. We use T6 aircraft grade aluminum with excellent strength-to-weight ratio and corrosion resistance to produce the leveling kit.