Transfer Case
WARNING: This page is about a different car, the 2002 GMC Sierra and 2002 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Remove fill and drain plugs from transfer case. After fluid has drained, reinstall drain plug and tighten to specification. See TORQUE SPECIFICATIONS . Fill transfer case with appropriate fluid to proper level. See RECOMMENDED FLUIDS and FLUID CAPACITIES . Install transfer case fill plug and tighten to specification.