Rear Axle Oil Change Procedure

1. Raise and suitably support vehicle.
2. Place a drain pan or suitable container under rear axle housing.





3. Remove rear axle housing oil level/filler plug from rear axle housing.
4. Remove rear axle housing drain plug from rear axle housing and drain rear axle housing.
5. Apply GM P/N 12346004, or equivalent, to the threaded portion of the rear axle housing drain plug.
6. Install rear axle housing drain plug into rear axle housing after rear axle housing has completely drained.
- Tighten rear axle housing drain plug to 25 Nm (18 ft. lbs.).
7. Refill the rear axle housing with approximately 2.2 liters (4.6 pts.) of 80W-90 GL5 lubricant or equivalent. Oil level should be even with the bottom of the rear axle housing oil level/filler plug hole.
8. Install rear axle housing oil level/filler plug into rear axle housing.
- Tighten rear axle housing oil level/filler plug to 43 Nm (32 ft. lbs.).
9. Remove drain pan from under rear axle housing.
10. Lower vehicle.