Rough Country - 180.20-4-inch Suspension Lift System w/Premium N2.0 Shocks for Chevrolet: 69-72 1/2-Ton Pickup 4WD, 69-72 1/2-Ton Suburban 4WD, 69-72 3/4-Ton Pickup 4WD, 69-72 Blazer 4WD; GMC: 6. FITMENT: Chevrolet: 69-72 1/2-Ton Pickup 4WD, 69-72 1/2-Ton Suburban 4WD, 69-72 3/4-Ton Pickup 4WD, 69-72 Blazer 4WD; GMC: 69-72 1/2-Ton Pickup 4WD, 69-72 1/2-Ton Suburban 4WD, 69-72 3/4-Ton Pickup 4WD, 70-72 Jimmy 4WD KIT CONTENTS: Front: Lifted leaf springs, brake line relocation brackets, u-bolts, and hardware; Rear: 4-inch lift leaf springs, u-bolts, and hardware; Shocks: (4) Premium N2.0 Shocks TECHNICAL NOTES: Fits 52-inch rear leaf spring models only; If vehicle is equipped with a front sway-bar, drop brackets are recommended (#1019); Optional steering arm only works with a 3 bolt open knuckle (#6600) ITEM SPECIFICS: Installation Time: 6-8 hours; Recommended Tire Size: 35-by-12.50; Weight: 258.95-lbs; Superseded: 180H