Fluid - Differential: Testing and Inspection

Lubricant Level Check
1. Raise the vehicle. Support the vehicle.





2. Remove the rear axle housing oil level/filler plug (1) from the rear axle housing.
3. Inspect the rear axle oil level. The oil level should be even with the bottom of the rear axle housing oil level/filler plug hole. If the oil level is low and no oil leaks exist, adjust the oil using 80W-90 GL5 lubricant GM P/N 12345977 (Canadian P/N 10953482), or equivalent.

Notice: Refer to Fastener Notice in Service Precautions.

4. Install the rear axle housing oil level/filler plug into the rear axle housing.
Tighten the rear axle housing oil level/filler plug to 43 Nm (32 ft. lbs.).
5. Lower the vehicle.