GM Service Manual Online
For 1990-2009 cars only

Draining Procedure


    Object Number: 814134  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Clean any dirt from around the differential drain plug.
  3. Position a drain pan under drain plug.
  4. Remove the drain plug from the differential and drain the fluid.

Filling Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 814134  Size: SH
  1. Install the drain plug to the differential.
  2. Tighten
    Tighten the differential drain plug to 39 N·m (29 lb ft).


    Object Number: 814133  Size: SH
  3. Clean any dirt from around the differential fill plug.
  4. Remove the fill plug from the differential.
  5. Important: If equipped with a limited slip differential, limited slip differential lubricant additive, SGM P/N 1052358 (Canadian P/N 992394) or equivalent must be added first. Refer to Lubrication Specifications .

  6. Fill the differential with 75W90 synthetic axle lubricant , SGM P/N 89021677 or equivalent. Refer to Lubrication Specifications .
  7. Inspect the gear lubricant level to ensure it is even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
  8. Install the fill plug to the differential.
  9. Tighten
    Tighten the fill plug to 39 N·m (29 lb ft).

  10. Lower the vehicle.