GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 748031  Size: SH
  1. Apply the parking brake.
  2. Remove the master cylinder. Refer to Master Cylinder Replacement .

  3. Object Number: 748028  Size: SH
  4. Disconnect the vacuum hose from the vacuum booster and from the engine.
  5. Remove the left closeout/insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Left Side in Instrument Panel, Gages and Console.

  6. Object Number: 748017  Size: SH
  7. Remove the pushrod retainer (3) from the brake pedal pin (4).
  8. Remove the stop lamp switch (1) and the pushrod (2) from the brake pedal pin (4).

  9. Object Number: 748032  Size: SH
  10. Remove the vacuum booster mounting nuts.
  11. Remove the vacuum booster assembly.
  12. Remove the gasket.

Installation Procedure


    Object Number: 748032  Size: SH
  1. Install the gasket and the vacuum booster assembly.
  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 vacuum booster mounting nuts on the vacuum booster.
  4. Tighten
    Tighten the vacuum booster mounting nuts to 36 N·m (27 lb ft).


    Object Number: 748017  Size: SH
  5. Position the stop lamp switch (1) on the pushrod (2) and install on the brake pedal pin .
  6. Install the pushrod retainer (3) to the brake pedal pin (4). The retainer will snap into place.
  7. Install the left closeout/insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Left Side in Instrument Panel, Gages and Console.

  8. Object Number: 748028  Size: SH
  9. Install the vacuum hose to the vacuum booster and to the engine.
  10. Install the master cylinder. Refer to Master Cylinder Replacement .