GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2008 🢒 Torrent 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Power Vacuum Brake Booster Replacement

Removal Procedure

    Object Number: 926611 Size: SH
  1. Remove the underhood electrical center bracket. Refer to Underhood Electrical Center or Junction Block Bracket Replacement .
  2. Disconnect the coolant surge hose from the surge tank and position aside.
  3. Remove the master cylinder mounting nuts. Do not disconnect the brake pipes from the master cylinder.
  4. Carefully pull the master cylinder away from the vacuum booster and position aside.
  5. Disconnect the vacuum booster check valve and hose assembly from the booster. Refer to Vacuum Brake Booster Check Valve and/or Hose Replacement .
  6. Remove the brake pressure modulator valve assembly. Refer to Brake Pressure Modulator Valve Replacement .

    7. Object Number: 931345 Size: SH
  7. Remove the brake pressure modulator valve bracket. Refer to Brake Pressure Modulator Valve Bracket Replacement .

    8. Object Number: 926065 Size: SH
  8. Remove the brake booster push rod-to-brake pedal retaining clip.
  9. Remove the foam washer from the brake pedal assembly.

    10. Object Number: 925895 Size: SH
  10. Remove the brake booster mounting nuts.

    11. Important: Ensure that the foam insulator on the mounting surface of the brake booster withdraws with the booster.

  11. Disengage the brake booster from the front of dash and the brake pedal bracket. Maneuver the booster toward the center of the vehicle in order to ease removal.

Installation Procedure

    Object Number: 926065 Size: SH
  1. Install the foam insulator the vacuum brake booster.
  2. Install the brake booster to the vehicle.
  3. Install, but do not tighten, the booster mounting nuts.
  4. Lightly lubricate the booster push rod pivot pin on the brake pedal with silicone lubricant.
  5. Install the booster push rod to the pivot pin on the brake pedal.
  6. Install the foam washer to the pivot pin.
  7. Install the brake booster push rod retaining clip.

    8. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 925895 Size: SH
  8. Fully seat the brake booster to the front of dash and the brake pedal assembly.
  9. Tighten the vacuum brake booster mounting nuts.

    10. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).


    Object Number: 931345 Size: SH
  10. Install the brake pressure modulator valve bracket. Refer to Brake Pressure Modulator Valve Bracket Replacement .
  11. Install the brake pressure modulator valve assembly. Refer to Brake Pressure Modulator Valve Replacement .

    12. Object Number: 926611 Size: SH
  12. Install the vacuum booster check valve and hose assembly to the booster.
  13. Install the master cylinder to the booster. Refer to Master Cylinder Replacement .

    14. Object Number: 898638 Size: SH
  14. Install the coolant surge hose and clamp to the surge tank.
  15. Install the underhood electrical center bracket. Refer to Underhood Electrical Center or Junction Block Bracket Replacement .
  16. If necessary, bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding .