2004.5-2005 GM Duramax 6.6L LLY Gear Packages

Upgrading the gears on your 2004.5-2005 GM 6.6L Duramax LLY build is going to require a ton of hardware. Luckily for you, carry an entire selection of complete gear packages for the GM Sierra/Silverado 2500 or 3500 that come with front and rear ring-and-pinion gears, install kits, and even differentials so you truck gets everything it needs to win back the performance it lost by adding larger tires. Give your custom GM build better acceleration and torque delivery to all four tires with any of these premium total gear packages from your friends here at Alligator Performance! 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.