Your GM 2500HD/3500HD is a powerhouse off-road, but the factory lighting may fall short in low visibility and dark conditions. With our selection of Off-Road Light Mounts for your 2011-2016 6.6L Cummins, you can easily add powerful LED lights and light bars. These mounts support everything from basic 3" cube lights to high-output LED light bars, providing all the illumination you need to see everything with ease on the trail. Add additional illumination to your truck’s lighting setup with our efficient and brightHeadlights! GM Duramax Fitments: 2011, 2012, 2013, 2014, 2015, 2016 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.