Upgrade the suspension system of your 1999-2007 Silverado or Sierra with this Monroe 911504 monotube rear gas shock absorber. This shock absorber is made of high-quality steel material and comes with a shock and bushing, which makes the installation process easy, with no drilling required. The shock absorber is gas-charged, single-pipe, and has a travel length of 8.75 inches. This Monroe shock absorber is designed to provide you with a smooth ride, accurate fit, and better handling. The shock absorber comes with a screw-on mounting style and can be placed on the rear, left, or right side of the vehicle. It is a high-performance part that meets the OE/OEM part number of 22400370, 22400818, 22400265, 22400563, and 22400368.