Lubricant Level Check
INSPECTION PROCEDURE1. Raise and suitably support the vehicle. Refer to Vehicle Lift Points.
2. Clean any dirt from around the differential fill plug.
3. Remove the fill plug from the differential.
4. Check that the differential fluid level is 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.
^ If a small amount of fluid is needed, use rear axle lubricant GM P/N 12345977 or equivalent.
^ If the differential fluid level is very low, use rear axle lubricant GM P/N 12345977 or equivalent and add enough limited-slip differential additive GM P/N 1052358 or equivalent to maintain the original ratio of 1.6 Liter (1.69 Quart) of axle lubricant to 118 ml (4.0 oz) of limited-slip additive.
6. Install the fill plug to the differential.
^ Tighten the differential fill plug to 35 Nm (26 ft. lbs.).
NOTICE: Refer to Fastener Notice in Service Precautions.
7. Lower the vehicle.