For 1990-2009 cars only
- Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
- Place a drain pan or suitable container under the rear axle housing.
- Remove the rear axle housing oil level fill plug (1) from the rear axle housing.
- Remove the rear axle housing drain plug (4) from the rear axle housing and drain the rear axle housing.
- After the rear axle housing has completely drained, install the rear axle housing drain plug (4) into the rear axle housing.
- Refill the rear axle housing with approximately 1.0 liter (1.0 qt) of Synthetic Gear Oil 75W-140 GM P/N 89021809.
- Using a graduated measuring cup, add 25 ml (1.0 oz) of Limited Slip Differential Friction Modifier GM P/N 89021958 to the rear axle housing.
- Fill the rear axle housing with the remaining 0.575 liter (0.644 qt) of Synthetic Gear Oil 75W-140 GM P/N 89021809. The oil level should be even with the bottom of the rear axle housing oil level filler plug hole.
- Install the rear axle housing oil level fill plug (1) with a new gasket and the lubricant tag (2) into the rear axle housing.
- Remove the drain pan from under the rear axle housing.
- Lower the vehicle.
Notice: Refer to Fastener Notice in the Preface section.
Tighten
Tighten the rear axle housing oil level filler plug
to 27 N·m (20 lb ft).
Tighten
Tighten the rear axle housing oil level fill plug
to 27 N·m (20 lb ft).
