GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Seville - RHD 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Power Brake Booster Replacement

Removal Procedure

    Object Number: 296121 Size: SH
  1. Relieve the brake system pressure.
  2. Sipon the brake fluid from the hydraulic brake booster reservoir.
  3. Disconnect the master cylinder fluid level sensor electrical connector.
  4. Remove the master cylinder attaching nuts.
  5. Remove the master cylinder from the booster. Move the master cylinder forward just enough to clear the studs on the booster. This will flex the brake pipes slightly. It's important to be careful not to bend or distort the pipes.

    6. Object Number: 296128 Size: SH
  6. Remove the booster attaching nuts from the brake pedal assembly.
  7. Disconnect the hydraulic pressure (feed) line from the booster.
  8. Remove the right sound insulator. Refer to Instrument Panel Insulator Panel Replacement in Body and Accessories.

    9. Object Number: 287901 Size: SH
  9. Remove the pushrod retainer (2) and the washer (1) from the brake pedal clevis pin.
  10. Remove the booster pushrod from the brake pedal. Tilt the entire booster slightly to work pushrod off the pedal clevis pin without putting undue side pressure on the pushrod.
  11. Pull booster forward and Remove return hose clamp and hose from the booster.

    12. Object Number: 296144 Size: SH
  12. Remove the booster from the vehicle.

Installation Procedure

    Object Number: 296144 Size: SH
  1. Install the booster to the vehicle.
  2. Install the return hose and clamp on the booster.

    3. Object Number: 287901 Size: SH
  3. Install the booster pushrod to the brake pedal.
  4. Install the pushrod retainer (2) and the washer (1) from the brake pedal clevis pin.
  5. Install the right sound insulator. Refer to Instrument Panel Insulator Panel Replacement in Body and Accessories.

    6. Object Number: 296128 Size: SH
  6. Install the booster attaching nuts onto the booster studs.
  7. Install the acoustical barrier to the booster studs (under the I/P).

    8. Object Number: 296121 Size: SH
  8. Install the master cylinder onto the booster.
  9. Connect the hydraulic pressure (feed) line to the booster.

    10. 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.

  10. Install the master cylinder attaching nuts.

    11. Tighten
    Tighten the nuts to 27 N·m (20 lb ft).

  11. Fill the booster reservoir.
  12. Connect the fluid level sensor electrical connector.
  13. If the hydraulic system was opened, bleed the brake system. Refer to Hydraulic Brake System Bleeding .