K 1500 Yukon 4WD V8-5.3L VIN Z Flex Fuel (2003)
1. Install the drain plug.
Tighten
Tighten the plug to 20 N.m (15 lb ft).
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
Tighten the plug to 20 N.m (15 lb ft).
4. Install the transfer case shield, if equipped.
5. Lower the vehicle.