2004.5-2005 GM Duramax 6.6L LLY Tonneau Covers

A tonneau cover is a must-have for any 2004.5-2005 GM 6.6L Duramax LLY builds that see a ton of use out of its bed. Tonneau covers are a great way to shield your gear from any inclement weather, prying eyes, or would-be thieves when you're out and about. We carry tonneaus that range from basic roll-ups to hands-free retractable designs, so you'll be sure to find a cover the best fits your particular budget and needs. 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.