Lubricant Change

Lubricant Change

Draining Procedure





1. Raise and support the vehicle.
2. Clean any dirt from around the differential drain plug.
3. Position a drain pan under drain plug.
4. Remove the drain plug from the differential and drain the fluid.

Filling Procedure





1. Install the drain plug to the differential.
Tighten the differential drain plug to 39 Nm (29 ft. lbs.).

Notice: Refer to Fastener Notice in Service Precautions.






2. Clean any dirt from around the differential fill plug.
3. Remove the fill plug from the differential.

4. Fill the differential with 75W90 synthetic axle lubricant, GM P/N 12378261 (Canadian P/N 10953455) or equivalent.

Important: If equipped with a limited slip differential, limited slip differential lubricant additive, GM P/N 1052358 (Canadian P/N 992394) or equivalent must be added first.

5. Inspect the gear lubricant level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 inch) below the opening.

6. Install the fill plug to the differential.
Tighten the fill plug to 39 Nm (29 ft. lbs.).

Notice: Refer to Fastener Notice in Service Precautions.

7. Lower the vehicle.