GM Service Manual Online
For 1990-2009 cars only

Rear Axle Housing Cover and Gasket Replacement 8.6, 9.5 Inch Axles

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. For the 9.5 inch axle, drain the rear axle. Refer to Rear Axle Lubricant Replacement.

  3. Object Number: 1689173  Size: SH
  4. Remove the rear axle housing cover bolts (1).
  5. Note: DO NOT nick or cut the rear axle housing cover gasket.

  6. Remove the rear axle housing cover (2)  and the gasket (3) from the axle housing.
  7. If the rear axle housing cover gasket is found to be damaged, DO NOT re-use. Replace with NEW.
  8. Drain the remaining axle lubricant into a suitable container.

Installation Procedure


    Object Number: 1689173  Size: SH
  1. If the gasket is to be re-used, clean the sealing surfaces of the rear axle housing and the rear axle cover with a suitable cleaner.
  2. Install the rear axle housing cover gasket (3) and the cover  (2) to the rear axle housing.
  3. Caution: Refer to Fastener Caution in the Preface section.

  4. Install the rear axle housing cover bolts (1) and tighten to 30 N·m (20 lb ft).
  5. Install the drain plug for the 9.5 inch axle. Refer to Rear Axle Lubricant Replacement.
  6. Fill the rear axle with the proper axle lubricant. Refer to Rear Axle Lubricant Level Inspection.
  7. Remove the support and lower the vehicle.

Rear Axle Housing Cover and Gasket Replacement 10.5 Inch Axle

Removal Procedure


    Object Number: 1959512  Size: SH
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Drain the rear axle. Refer to Rear Axle Lubricant Replacement.
  3. Note: Discard the axle housing cover bolts. Use NEW only.

  4. Remove the rear axle cover bolts (1), cover (2), and the gasket (3).
  5. Remove any gasket material from the rear axle housing and/or axle housing cover.

Installation Procedure


    Object Number: 1959512  Size: SH
  1. Position the axle housing cover (2) and the gasket (3) on the rear axle.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the NEW axle housing cover bolts (1) and tighten to 40 N·m (30 lb ft).
  4. Fill the rear drive axle with the proper fluid. Refer to Rear Axle Lubricant Replacement.
  5. Remove the support and lower the vehicle.