- Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle
.
- Clean any dirt from around the differential fill plug.
- Remove the fill plug from the differential and drain the fluid.
- Check the differential fluid level, it should be even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
- Add new fluid if necessary.
- Fill the differential with 75W90 synthetic axle lubricant , GM P/N 12378261 (Canadian P/N 10953455) or equivalent. Refer to
Approximate Fluid Capacities
.
Notice: Refer to Fastener Notice in the Preface section.
- Install the differential fill plug to the differential.
Tighten
Tighten the differential fill plug to 39 Nยทm (29 lb ft).
- Lower the vehicle.