GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 LeSabre 🢒 Brakes 🢒 Disc Brakes 🢒 Rear Brake Caliper Overhaul

    Object Number: 105774 Size: SH
  1. Remove the rear caliper from vehicle. Refer to Brake Caliper Replacement .
  2. Remove piston and piston boot by turning the piston (2) counterclockwise using a spanner type wrench.

    3. Notice: Do not use a metal tool for seal removal. Damage to the caliper bore or the seal grooves can result.


    Object Number: 517729 Size: SH
  3. Remove the boot ring from the groove in the caliper bore with a small wooden or plastic tool.

    4. Object Number: 517749 Size: SH
  4. Remove the piston seal with a small wooden or plastic tool.

    5. Object Number: 517735 Size: SH
  5. Remove the piston boot from the piston.

    6. Object Number: 517733 Size: SH
  6. Remove the bleeder valve from the caliper body.

    7. Important: The lever return spring is the only component in the parking brake mechanism that can be removed or replaced. Do not disassemble the parking brake mechanism. Replace the caliper if the parking brake is damaged or inoperative.

  7. Replace the lever return spring if damaged.

    8. Object Number: 517743 Size: SH
  8. Remove the snap ring from the piston with snap ring pliers.

    9. Important: Replace the caliper piston if any of the internal parts are damaged.


    Object Number: 517744 Size: SH
  9. Remove and inspect the spacer, wave washer, spacer, ball bearings, and adjusting nut from the piston.

    10. Object Number: 517748 Size: SH
  10. Clean all of the parts with denatured alcohol. Dry all of the parts with dry filtered, low pressure compressed air. Blow out all of the passages in the caliper body and the bleeder valve.

    11. Important: The piston sliding surface is plated. Do not polish with emery paper.

  11. Inspect the piston for scoring, rust , wear, damage, or presence of foreign objects. Replace the piston if any of these conditions have occurred.

    12. Important: Use new brake fluid to clean the caliper cylinder, do not use mineral oil.

    Minor damage from light rust or foreign objects may be eliminated by polishing the cylinder surface with a fine emery paper.

  12. Inspect the inside surface of the cylinder for scoring, rust, wear, damage, or presence of foreign objects. Replace the caliper body if any of these conditions have occurred.

    13. Object Number: 517744 Size: SH
  13. Install the adjusting nut, ball bearings, spacer, wave washer, and spacer in the piston.

    14. Object Number: 517743 Size: SH
  14. Install the snap ring in the piston.
  15. Install the bleeder valve in the caliper body.

    16. Object Number: 517749 Size: SH
  16. Lubricate the new piston seal with clean brake fluid .
  17. Install the piston seal in the caliper bore.

    18. Object Number: 517735 Size: SH
  18. Install the new boot on the piston.

    19. Object Number: 105774 Size: SH
  19. Screw the piston (2) into the caliper body (1) using a spanner type wrench.

    20. Object Number: 517755 Size: SH
  20. Install the boot ring inside the caliper counterbore against the piston boot.
  21. Install the caliper onto the vehicle. Refer to Brake Caliper Replacement .