GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 21177-A Drum to Brake Shoe Clearance Gage

Removal Procedure

Caution: Refer to Brake Dust Caution in the Preface section.


    Object Number: 1254558  Size: SH
  1. Release the park brake.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Remove the brake drum. Refer to Brake Drum Replacement .
  4. Adjust the brake shoe to the lowest setting.

  5. Object Number: 1254560  Size: SH
  6. Remove the adjuster spring.

  7. Object Number: 1254569  Size: SH
  8. Remove the brake adjuster lever.

  9. Object Number: 1254560  Size: SH
  10. Remove the adjuster assembly.

Installation Procedure


    Object Number: 1254565  Size: SH
  1. Install the adjuster assembly.

  2. Object Number: 1254569  Size: SH
  3. Install the adjuster lever.

  4. Object Number: 1254560  Size: SH
  5. Install the adjuster spring.

  6. Object Number: 1241711  Size: SH
  7. Using the J 21177-A  (1), measure the rear brake drum. Refer to Brake Drum Diameter Measurement .
  8. Adjust the rear drum brakes. Refer to Drum Brake Adjustment .

  9. Object Number: 1254558  Size: SH
  10. Install the brake drum. Refer to Brake Drum Replacement .
  11. Lower the vehicle.