Fluid - Transfer Case: Service and Repair

1. Raise the vehicle. Support the vehicle. Refer to Vehicle Lifting Points.
2. Place a drain pan or suitable container underneath the transfer case.

IMPORTANT: It is not necessary to remove the transfer case skid plate (2) in order to gain access to the transfer case drain plug (3). An access opening in the transfer case skid plate has been provided for wrench access as well as transfer case oil drainage,





3. Remove the transfer case oil level/filler plug (1) from the transfer case.





4. Remove the transfer case drain plug (3) from the transfer case and drain the transfer case oil.
5. Apply GM P/N 12346004, or the equivalent, to the threaded portion of the transfer case drain plug.
6. Place the transfer case drain plug into the transfer case.
^ Tighten the transfer case drain plug to 28 Nm (21 ft. lbs.).

NOTICE: Refer to Fastener Notice in Service Precautions.

7. Add approximately 1.7 liters (1.8 qts.) of 75W-90 GL4 the lubricant or equivalent, into the oil level/filler plug hole. The oil level should be even with the bottom of the oil level/filler plug hole.
8. Apply GM P/N 12346004, or the equivalent, to the threaded portion of the transfer case oil level/filler plug.





9. Place the transfer case oil level/filler plug (1) into the transfer case.
^ Tighten the case oil level/filler plug to 23 Nm (17 ft. lbs.).

10. Lower the vehicle.