GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2008 🢒 G8 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Power Vacuum Brake Booster Replacement

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.

    Important: The electrical system of the vehicle must be disabled to prevent operation of the wiper system while working in the vicinity of the wiper motor and linkages. Operation of the wiper system while working in the vicinity of the wiper motor and linkages may cause personal injury.

  1. Disconnect the battery ground cable. Refer to Battery Negative Cable Disconnection and Connection .

    2. Caution: Refer to Brake Fluid Caution in the Preface section.

    Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

    Notice: Refer to Adding Fluid to the Brake System Notice in the Preface section.

    Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.

  2. Remove the knee bolster. Refer to Knee Bolster Replacement .
  3. Remove the instrument panel insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Left Side .
  4. Remove the instrument panel retainer. Refer to Instrument Panel Retainer Replacement .
  5. Remove the power brake booster vacuum sensor from the vehicle if fitted. Refer to Power Brake Booster Vacuum Sensor Replacement .
  6. Remove the master cylinder from the vehicle. Refer to Master Cylinder Replacement .
  7. Remove the vacuum hose and check valve from the vacuum brake booster. Refer to Power Brake Booster Inlet Hose Replacement .

    8. Object Number: 2074851 Size: SH
  8. Remove the brake pedal pushrod retaining bolt (1), clip (2) and the brake pedal pushrod (3) from the brake pedal (4).

    9. Object Number: 1943701 Size: SH
  9. Remove the vacuum brake booster to brake pedal support bracket retaining nuts (1).

    10. Important: From the engine compartment, pull the vacuum brake booster forward to release the four studs from the bulkhead and brake pedal support bracket.

  10. Remove the vacuum brake booster from the vehicle.

Installation Procedure

    Notice: Refer to Adding Fluid to the Brake System Notice in the Preface section.

  1. With the aid of an assistant, install the vacuum brake booster from the engine compartment. Make sure the vacuum brake booster's four studs are correctly located in the bulkhead and brake pedal support bracket.

    2. Object Number: 2074851 Size: SH
  2. Install the brake pedal push rod (3), clip (2) and brake pedal push rod retaining bolt (1) to the brake pedal (4).

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


    Object Number: 1943701 Size: SH
  3. Install the vacuum brake booster to brake pedal support bracket retaining nuts (1).

    4. Tighten
    Tighten the nuts to 23 N·m. (17 lb ft

  4. Install the vacuum hose and check valve to the vacuum brake booster. Refer to Power Brake Booster Inlet Hose Replacement .
  5. Install the master cylinder to the vacuum brake booster. Refer to Master Cylinder Replacement .
  6. Install the power brake booster vacuum sensor from the vehicle if fitted. Refer to Power Brake Booster Vacuum Sensor Replacement .
  7. Bleed the braking system. Refer to Hydraulic Brake System Bleeding .
  8. Install the instrument panel retainer. Refer to Instrument Panel Retainer Replacement .
  9. Install the instrument panel insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Left Side .
  10. Install the knee bolster. Refer to Knee Bolster Replacement .
  11. Connect the battery ground cable. Refer to Battery Negative Cable Disconnection and Connection .