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

Enhance the traction of your GM 2500HD/3500HD with our differential upgrades, perfect for both on-road and off-road driving. Aftermarket locking or limited-slip differentials provide superior traction by locking your front or rear axles, ensuring your tires stay engaged when you need it most. At Alligator Performance, we offer a variety of differentials, including both locking and limited-slip options, so you can find the ideal upgrade for your high-performance GM 2500HD/3500HD build. Pair your new differential upgrade with a new set of Wheels & Tires.  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.