Liftcraft - Adjustable 1 to 3 inches Front 3 inch Rear Lift Kit for 2000-2006 GMC Yukon 6-Lug 4WD | Steel Torsion Keys Billet Lift Spacers and Shock Extenders Lift Kit (Silver) LIFT: 1-3 inch adjustable front and 3 inch rear suspension lift over stock FITMENT: 2000 - 2006 GMC Yukon 1500 4WD models | NOTE: Will fit 6-Lug models only MATERIAL: High Strength Steel Torsion Bar Lift Keys and Shock Extenders | 6061-T6 Billet Aluminum Lift Blocks INSTALLATION: Bolt-on kit, only takes a few hours to install; No modifications required CONTENTS: Carbon Steel Torsion Keys (2), Aluminum Spring Spacers (2), Carbon Steel Shock Extenders (2), Hardware and Detailed Instructions - Liftcraft suspension lift and leveling kits come with a lifetime guarantee and are the easiest, safest, and most affordable way to improve the look of your truck and run bigger tires