GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the coolant reservoir. Refer to Coolant Recovery Reservoir Replacement in Engine controls.
  2. Relieve Fuel line pressure . Refer to Fuel Pressure Relief in Engine controls.
  3. Remove Cruise control module and cruise control bracket and set aside. Refer to Cruise Control Module Replacement in Body and Accessories.
  4. Remove left front cross brace. Refer to Front End Sheet Metal Diagonal Brace Replacement - Left Side in Body and Accessories.
  5. Remove PCM cover from air cleaner housing.
  6. Remove the PCM and set aside. Not necessary to disconnect electrical. Refer to Powertrain Control Module Replacement in engine controls.
  7. Remove the air cleaner and the duct. Refer to Air Cleaner Assembly Replacement in Engine Controls.
  8. Remove the fuel lines from the pipes and the vapor line. Refer to Fuel Hose/Pipes Replacement - Engine Compartment in engine controls.
  9. Disconnect fluid level sensor switch from brake master cylinder.
  10. Disconnect brake lines from the master cylinder and remove master cylinder. Refer to Master Cylinder Replacement

  11. Object Number: 177473  Size: SH
  12. Remove the vacuum hose from the vacuum check valve. Reposition the vacuum hose.
  13. Unclip the wire harness from the ABS module bracket and disconnect the electrical connector at the ABS module .
  14. Remove the brake lines from the ABS module.
  15. Remove the ABS module and bracket . Refer to Brake Pressure Modulator Valve Replacement in Antilock brakes .

  16. Object Number: 180291  Size: SH

    Notice: When disconnecting the pushrod from the brake pedal, the brake pedal must be held stationary or damage to the brake switch may result.

  17. Remove the booster push rod retaining clip and washer (2) from the brake pedal assembly.
  18. Remove the brake booster push rod (2) from the brake pedal (1).

  19. Object Number: 180993  Size: SH
  20. Remove the brake booster mounting nuts.
  21. Remove the brake booster.

Installation Procedure

Caution: When replacing the power booster brake, make sure that the cruise control cable is not routed between the booster and the cowl. If the cable is damaged or pinched, it must be replaced. Failure to do this could result in personal injury.

Notice: Proper stoplamp switch adjustment is essential. Improper stoplamp switch adjustment may cause brake drag, heat buildup and excessive brake lining wear.


    Object Number: 180993  Size: SH
  1. Install the brake booster and Position to the cowl and the mounting plate.
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the brake booster mounting nuts.
  4. Tighten
    Tighten the brake booster mounting nuts to 25 N·m (18 lb ft).


    Object Number: 180291  Size: SH
  5. Install the brake booster push rod (2) to the brake pedal (1).
  6. Install the brake booster rod retaining washer and clip to the brake pedal assembly.
  7. Adjust the stop lamp switch. Refer to Stop Lamp Switch Adjustment in Lighting System.
  8. Install ABS module bracket and module. Refer to Brake Pressure Modulator Valve Replacement in Antilock brake systems.
  9. Connect the brake lines to the module.
  10. Connect the electrical connector to the ABS module and clip the electrical harness to the bracket .
  11. Install the vacuum hose to the check valve.
  12. Install the brake master cylinder and connect the brake lines . Refer to Master Cylinder Replacement
  13. Connect fluid level sensor switch on the master cylinder.
  14. Install the fuel lines to the pipes and the vapor line. Refer to Fuel Hose/Pipes Replacement - Engine Compartment in Engine Controls.
  15. Install the air cleaner and duct assembly. Refer to Air Cleaner Assembly Replacement in engine controls.
  16. Install the PCM . Refer to Powertrain Control Module Replacement in Body and Accessories.
  17. Install the PCM cover.
  18. Install the left front cross brace . Refer to Front End Sheet Metal Diagonal Brace Replacement - Left Side in Body and Accessories.
  19. Install Cruise control bracket and the cruise control module . Refer to Cruise Control Module Replacement in Body and Accessories.
  20. Install the coolant reservoir . Refer to Coolant Recovery Reservoir Replacement in engine controls.
  21. Bleed the brake system. Refer to Hydraulic Brake System Bleeding