GM Service Manual Online
For 1990-2009 cars only

Inspection Procedure


    Object Number: 71497  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Clean any dirt from around the differential fill plug.
  3. Remove the fill plug, lubricant tag, and washer 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.
  6. • Fill with synthetic axle lubricant GM P/N 1237826 (Canadian P/N 10953455).
    • If necessary, add enough limited-slip differential lubricant additive GM P/N 1052358 (Canadian P/N 992694), 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: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Install the fill plug, lubricant tag, and washer to the differential.
  8. Tighten
    Tighten the differential fill plug to 35 N·m (26 lb ft).

  9. Lower the vehicle.