2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Tonneau Accessories

Adding on a premium tonneau cover to your 2004.5-2005 GM Sierra or Silverado 2500/3500HD means your truck can handle it all, but even the toughest bed covers on the market could use some accessories to make them perform at their very best. Here at Alligator performance, we carry a selection of tonneau cover accessories and bed accessories so you can get the most out of each adventure. Whether you need improved organization for the job-site or an increase in storage capacity for those long hauls, you'll be sure to love what you find for your GM 6.6L Duramax LLY build. 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.