If you find yourself frequently towing near your 2017-2019 GM 6.6L Duramax L5P’s GVWR or GCWR, upgrading your truck’s hitch is essential for a safer and more reliable towing experience. Aftermarket Class III hitches are stronger and more durable than the factory-installed hitches found on many GM 2500HD/3500HD models, providing better towing performance and longevity under heavy loads. Pair your new hitch with some Helper Springs or a Sway Bar to further improve load stability and towing control on your next journey.GM Duramax Fitments: 2017, 2018, 2019 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.