What type of fluid is used in the transfer case a 2003 gmc sierra 2500hd duramax truck?
The 2003 GMC Sierra 2500HD Duramax uses synthetic ATF (Automatic Transmission Fluid) in its transfer case. However, it's crucial to check your owner's manual to confirm the exact specification recommended by GMC. The type of ATF can vary slightly depending on the specific transfer case model installed in your truck. Using the incorrect fluid can damage the transfer case.