2017-2019 GM 2500HD/3500HD 6.6L L5 Duramax Tonneau Covers

Protecting the gear in your 2017-2019 GM 6.6L Duramax L5P’s bed is made simple with a premium tonneau cover from Alligator Performance! These aftermarket covers come in a variety of configurations—roll-up, folding, and retractable—offering different levels of functionality based on your needs. Not only do tonneau covers keep your cargo secure and shielded from the elements, but they also help improve fuel economy by reducing wind drag, giving your truck a more aerodynamic profile. Once you've found the bed cover that best fits your GM 2500HD/3500HD build, check out our inventory of Roof Racks and Bed Racks for even more ways to secure you cargo. 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.