Draining & Refilling: Transmission

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 GMC C3500 HD, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Raise and suitably support the vehicle. Place a suitable drain pan under the transmission in order to catch the drained transmission fluid. Remove fill and drain plugs.
Remove any old sealant from the transmission housing. Apply a thin bead of Thread Sealant (GM P/N 12346004) or equivalent, to the oil drain and fill plug threads.
After fluid has drained, reinstall drain plug and tighten to specification. See TORQUE SPECIFICATIONS .
Fill transmission with appropriate fluid to proper level. See RECOMMENDED FLUIDS and FLUID CAPACITIES . Install fill plug and tighten to specification. See TORQUE SPECIFICATIONS .

Fig 1: Removing & Installing Oil Fill Plug (NV3500)

Courtesy of GENERAL MOTORS CORP.