Enhance your lifted GM 2500HD/3500HD suspension with our extensive range of Lift Kit Upgrades. Our selection includes essential components like control arms, block kits, bump stops, shock mounts, drop brackets, and more. These upgrades enhance your suspension’s durability and allow for precise adjustments, ensuring your truck performs at its best. Pair your Lift Kit upgrades with our selection of Wheels & Tires!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.