CTS V6-3.2L VIN N (2003)
Fluid - Differential: Testing and Inspection
Lubricant Level Inspection - Rear Drive Axle
Inspection Procedure
1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Clean any dirt from around the differential fill plug.
3. Remove the fill plug from the differential and drain the fluid.
4. 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 inch) below the opening.
5. Add new fluid if necessary.
6. Fill the differential with 75W-90 synthetic axle lubricant, GM P/N 12378261 (Canadian P/N 10953455) or equivalent.
Notice: Refer to Fastener Notice in Service Precautions.
7. Install the differential fill plug to the differential.
Tighten the differential fill plug to 39 Nm (29 ft. lbs.).
8. Lower the vehicle.
