2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Tonneau Accessories

Equipping your 2020-2025 GM Sierra or Silverado 2500HD/3500HD with a high-quality tonneau cover gives you more protection and utility for your adventures, but in order to achieve its full potential, you’re going to need some accessories. At Alligator Performance, we offer a selection of durable tonneau cover accessories designed to enhance the overall functionality and convenience of your truck bed. From cargo management tools to premium tailgate seals, these accessories ensure your tonneau cover and bed are ready for anything you throw their way. Pair these accessories with a new Bed Rack or Bed Liner to fully optimize your truck's cargo capacity and keep your gear safe, secure, and organized on every journey.  GM Duramax Fitments: 2020, 2021, 2022, 2023, 2024, 2025 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.