2011-2019 GMC Sierra HD Full Suspension Lift Kit & Shock Extenders 4WD 4x4 | SUPREME'S NEW HD STEEL LIFT BLOCKS!2x Front Steel Torsion Keys 2x Front Shock Extenders 2x Rear Steel Lift Blocks 4x Premium Electrostatic Powder Coated U Bolts Installation instructions Precision CNC Machined for Outstanding Performance and Quality Proprietary Protective Coating to Prevent Oxidation, Corrosion & Rust Increase Ground Clearance & Install Custom Plus Sized Rims & Tires IMPORTANT: Fits 4x4 8 Lug Models Only. This kit will NOT work with rear OVERLOADS or DUALLY Models, as

Manufactured with provisions for center axle alignment pins

Manufactured from Military Grade Armor Steel

IMPORTANT: Fits both front and rear for this model

Stud Size: M14 x 1

and machined materials with highest strength ratings

Our Pro-Billet Series lift kits are precision engineered to lift and level your truck for a more aggressive look over stock

more responsive suspension

Center Bore: 66

in accordance with ASTM B117 testing

SMALLER MOUNT SLEEVE / BUSHING IS REQUIRED FOR THEM

Precision CNC machined for perfect fitment

Note: Please be sure to check with your local DMV before you purchase the 3" rear lift for your 4WD model