Avalanche 2500 4WD V8-8.1L VIN G (2003)
1. Install the drain plug.
Tighten the plug to 20 Nm (15 ft. lbs.).
2. Fill the transfer case to the bottom of the fill plug hole with Auto-Trak II transfer case fluid, GM P/N 12378508 (Canadian P/N 10953626).
3. Install the fill plug.
Tighten the plug to 20 Nm (15 ft. lbs.).
4. Install the transfer case shield, if equipped.
5. Lower the vehicle.