2000-2010 GM 1500HD/2500HD/3500HD -8-Lug. Silverado/ Sierra/ Yukon/ Suburban/ Avalanche/ - 8-lug. 2.5" Torsion Key Leveling Kit with shocks extensions. The RTX Off Road Chevy Silverado 2500/3500 HD 8-lug 2.5 inch Torsion Key Leveling Kit will lift the front of your 2000-2010 Chevy Silverado 2500/3500 HD 8-lug 2WD & 4WD pickup or SUV to allow for larger wheels and tires. Provides a leveled stance. Includes shock mount extensions and hardware.