Transfer Case
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Manufacturer recommends Dexron-III ATF for NV149, NV261C and NV263C. Manufacturer recommends Auto-Trak II Fluid (GM P/N 12378508) for NV246 and NV246C.