GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Turn the ignition switch to the OFF position.
  2. Apply and release the brake pedal several times until the brake pedal becomes firm to deplete the brake booster vacuum reserve.
  3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.

  4. Object Number: 2080944  Size: SH
  5. Release the quick connect (2) from the power brake booster auxiliary pump.
  6. Position the vacuum brake booster hose assembly aside.

  7. Object Number: 2080948  Size: SH
  8. Disconnect the power brake booster auxiliary pump electrical connector.
  9. Release the power brake booster auxiliary pump electrical connector (1) from the bracket.

  10. Object Number: 2080951  Size: SH
  11. Remove the power brake booster auxiliary pump nuts (1).

  12. Object Number: 2080953  Size: SH
  13. Remove the power brake booster auxiliary pump bolts (1) and the pump (2).

  14. Object Number: 2080956  Size: SH
  15. If necessary, remove the power brake booster auxiliary pump insulators (1) and sleeves (2).

  16. Object Number: 2080959  Size: SH
  17. If necessary, remove the power brake booster auxiliary pump bracket bolts (1) and bracket (2).

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 2080959  Size: SH
  1. If removed, install the power brake booster auxiliary pump bracket bolts (1) and bracket (2) and tighten the bolts to  10 N·m (89 lb in).

  2. Object Number: 2080956  Size: SH
  3. If removed, install the power brake booster auxiliary pump insulators (1) and sleeves (2).

  4. Object Number: 2080953  Size: SH
  5. Install the power brake booster auxiliary pump bolts (1) and the pump (2) to the bracket.

  6. Object Number: 2080951  Size: SH
  7. Install the power brake booster auxiliary pump nuts (1) and tighten the nuts to  10 N·m (89 lb in).

  8. Object Number: 2080948  Size: SH
  9. Install the power brake booster auxiliary pump electrical connector (1) to the bracket.
  10. Connect the power brake booster auxiliary pump electrical connector.

  11. Object Number: 2080944  Size: SH
  12. Connect the quick connect (2) to the power brake booster auxiliary pump.
  13. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.