2004.5-2005 GM Duramax 6.6L LLY Differential Covers

Upgrading to an aftermarket differential on your 2004.5-2005 GM 6.6L Duramax is a great way to improve the overall protection and performance of your driveline components. In addition to providing access for changing gear lube and general maintenance, a new cover helps dissipate heat that can potentially damage your differential, ensuring consistent and reliable performance of your driveline even during heavy-duty applications. You'll also benefit from the protection provided against contaminants like dirt and water when you take the path less traveled, keeping your Sierra or Silverado on the road for longer. 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.