Supreme Suspensions - GMC K1500 K2500 K3500 1.5" Short Rear Add A Leaf Suspension Leveling Lift Kit 4WD 4x4 PRO Lifts and Levels Rear End 1.5 Inches Kit Improves Factory Leaf Sag Caused by Heavy Loads For models with single-pin leaf packs Installation Instructions Included Maintains Factory Ride