GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2000 🢒 DeVille 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Power Vacuum Brake Booster Replacement

Removal Procedure
  1. Place the vehicle on a flat surface
  2. Remove air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls.
  3. Remove the master cylinder. Refer to Master Cylinder Replacement .

    4. Object Number: 491255 Size: SH
  4. Remove the vacuum hose (2) from the vacuum booster.
  5. Set the parking brake.

    6. Caution: Chock the wheels to prevent the vehicle from moving. Failure to chock the wheels can cause personal injury when the electrical system is repaired.

  6. in Caution and Notices.

    7. Object Number: 491257 Size: SH
  7. To allow access for the removal of the brake booster, position gearshift lever into lowest gear.

    8. Object Number: 491290 Size: SH
  8. Remove retaining nut from coolant tube (1) Position coolant tube (2) out of way to allow access for removal of brake booster

    9. Object Number: 287894 Size: SH
  9. Remove the booster attaching nuts (1,2,3,) from the brake pedal assembly.

    10. Object Number: 569134 Size: SH
  10. Remove the retaining clip  (2 ) from booster pushrod. Tilt the entire booster slightly to work pushrod off the pedal clevis pin without putting undue side pressure on the pushrod.

    11. Object Number: 106322 Size: SH
  11. Remove the booster from the vehicle.
  12. Remove the gasket.

Installation Procedure
  1. Install the gasket to booster.

    2. Object Number: 106322 Size: SH
  2. Install the booster to the vehicle.

    3. Object Number: 569134 Size: SH
  3. Install the booster pushrod to the brake pedal. Tilt the entire booster slightly to work pushrod on the pedal clevis pin (2) without putting undue side pressure on the pushrod.

    4. Object Number: 287894 Size: SH

    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.

  4. Install the booster attaching nuts (1,2,3,) onto the booster studs.

    5. Tighten
    Tighten the brake pedal to booster stud nuts to 32 N·m (24 lb ft).


    Object Number: 491290 Size: SH
  5. Position coolant tube on the retaining stud (2) install the retaining nut (1).

    6. Tighten
    Tighten the coolant tube retaining nuts to 6 N·m (53 lb in).


    Object Number: 491324 Size: SH
  6. Position the gearshift lever into park

    7. Object Number: 491255 Size: SH
  7. Install the booster vacuum hose (2) in the vacuum booster.
  8. Install the Master cylinder. Refer to Master Cylinder Replacement .
  9. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls.
  10. Unblock the wheels.
  11. Release the parking brake.