Rough Country - 239N2-4.5-inch Suspension Lift Kit w/Premium N3 Shocks for Chevrolet: 99-06 Silverado 1500 2WD; GMC: 99-06 Sierra 1500 2WD FITMENT: Chevrolet: 99-06 Silverado 1500 2WD; GMC: 99-06 Sierra 1500 2WD KIT CONTENTS: Front: Lifted knuckles and coil springs; Rear: 3-inch lifted blocks and u-bolts; Shocks: (4) Premium N3 Shocks BENEFITS: 100% Bolt-on installation; Increased ground clearance; Maintains factory ride quality; Levels the front with the rear of the truck; N3 shocks are application valved providing optimum on and off-road performance and feature:; Nitrogen charged; Massive 1 & 3/8-inch bore; Chrome hardened 9/16-inch piston rod; 10 stage variable valving; Spring loaded piston rod seal; Military spec. fluid rated to -50 degrees Celsius TECHNICAL NOTES: Fits 6 lug models only ITEM SPECIFICS: Installation Time: 4-5 hours; Recommended Tire Size: 285/75 R16; Weight: 118.8-lbs