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

Upgrading to more aggressive ring-and-pinion gears allow your 2004.5-2005 GM 6.6L Duramax LLY build to compensate for larger tires to win back the acceleration lost and a proper powerband after installing larger tires. Aftermarket differentials supply additional power to both wheels on a single axle to improve traction and grip on any terrain and in every situation. A differential cover make maintenance a breeze and adds a great to your truck without compromise. Whatever your intended applications may be, win back some performance and improve your overall traction by investing in some premium driveline upgrades for your custom GM Sierra/Silverado. 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.