Your GM's worn-out rear shocks contribute to a harsh ride, vibrations, and excessive body roll. Upgrade to our high-performing 3-4" rear shocks to maximize comfort, control and performance of your truck! Purpose built with durable construction and precise design; our rear shocks are made to last while providing excellent dampening performance. Whether you're towing, hauling a heavy load, or simply seeking top performance, our rear shocks offer enhanced control and stability for your truck’s rear end. Pair your new set of rear shocks with our selection of 3-4" Front Shocks.GM Duramax Fitments: 2001, 2002, 2003, 2004 GM 6.6L Duramax.Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali.Some exceptions apply, please see individual product pages for specific fitments.