Fluid - Differential: Testing and Inspection

1. Raise the vehicle. Support the vehicle. Refer to Vehicle Lifting Points.





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-90GL5 lubricant GM P/N 12345977, or equivalent.
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.).

NOTICE: Refer to Fastener Notice in Service Precautions.

5. Lower the vehicle.