The factory lighting on your GM 2500HD/3500HD can fall short, especially on dark rural roads or nighttime trail adventures. Upgrading your truck’s lighting with our extensive selection ensures you get the brightness you need while giving your lighting system a modern edge. From powerful LED headlights and taillights to fog lights and off-road lights, we have everything you need to light up the night! Pair your upgraded lighting with our selection of rugged and stylish Exterior Upgrades. GM Duramax Fitments: 2004, 2005 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.