Installing a 7-8" lift kit on your GM 2500HD/3500HD is the ultimate solution to grant your truck a powerful presence both on and off the road. Many of our featured lift kits come with performance-enhancing shocks, coilover packages, springs, radius arms, sway bar links, track bars, and more! Find your aftermarket solution here at Alligator Performance! If you're looking to transform your bone-stock truck into a fully-fledged off-road powerhouse, be sure to find a nice set of Wheels & Tiresthat compliment your monstrous lift kit! GM Duramax Fitments: 2007, 2009, 2010 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.