Lubricant Level Check

Inspection Procedure





1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
2. Clean any dirt from around the differential fill plug.
3. Remove the e 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 synthetic axle lubricant GM P/N 12378261, or equivalent meeting GM specification 9986115.
^ If the differential fluid level is very low, use synthetic axle lubricant GM P/N 12378261, or equivalent meeting GM specification 9986115 and add enough limited-slip differential lubricant additive GM P/N 1052358, or equivalent to maintain the original ratio of 1.6 L (1.69 qt.) of axle lubricant to 118 mL (4.0 oz.) of limited-slip additive.

Notice: Refer to Fastener Notice in Service Precautions.

6. Install the fill plug to the differential.
Tighten the differential fill plug to 35 Nm (26 ft. lbs.).
7. Lower the vehicle.