Filling Procedure
- Install the drain plug (2) and gasket to the differential.
Tighten Tighten the differential drain plug to 32 N.m (23 lb ft).
- Clean any dirt from around the differential fill plug (1).
- Remove the fill plug from the differential.
- Fill the differential with synthetic gear oil GM P/N United States 12378514 Canada P/N 88901045.
- Inspect the gear oil level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
- Install the fill plug (1) and gasket to the differential.
Tighten Tighten the fill plug to 32 N.m (23 lb ft).
- Lower the vehicle.
Important The vehicle must be driven in tight left and right circles after filling the differential in order to distribute the gear lubricant throughout the differential.
- Operate the vehicle in tight right and left circles in order to engage the all-wheel-drive system.
- Raise and support the vehicle.
- Remove the fill plug from the differential.
- Inspect the gear oil level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
- Install the fill plug and gasket to the differential.
Tighten Tighten the fill plug to 32 N.m (23 lb ft).
- Lower the vehicle.