GM Service Manual Online
For 1990-2009 cars only

Inspection Procedure


    Object Number: 1978072  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Clean any dirt from around the differential fill plug (1).
  3. Remove the fill plug (1) from the differential.
  4. Check the differential fluid level, it should be even with the bottom of the fill plug hole to no lower than 6 mm (0.25 in) below the opening.
  5. Add new fluid if necessary. Refer to Adhesives, Fluids, Lubricants, and Sealers.
  6. Caution: Refer to Fastener Caution in the Preface section.

  7. Install the differential fill plug (1) to the differential and tighten to 39 N·m (29 lb ft).
  8. Remove the support and lower the vehicle.