GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2001 🢒 Regal (China) 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Master Cylinder Replacement

Removal Procedure

    Object Number: 448952 Size: SH
  1. Disconnect the brake fluid level sensor electrical connector (2) from the brake fluid level sensor.
  2. Disconnect the brake lines from the master cylinder.

    3. Object Number: 648179 Size: SH
  3. Remove master cylinder retaining nuts (1).
  4. Remove the master cylinder.
  5. Drain the master cylinder reservoir of all brake fluid.
  6. Remove the master cylinder reservoir. Refer to Master Cylinder Reservoir Replacement .

Installation Procedure

    Object Number: 648179 Size: SH
  1. Install the master cylinder reservoir. Refer to Master Cylinder Reservoir Replacement .
  2. Install the master cylinder.

    3. 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 master cylinder retaining nuts (1).

    4. Tighten
    Tighten the master cylinder retaining nuts (1) to 25 N·m (18 lb ft).

  4. Connect the brake pipes to the master cylinder.

    5. Tighten
    Tighten the master cylinder tube nuts to 15 N·m (11 lb ft).


    Object Number: 448952 Size: SH
  5. Connect the brake fluid level sensor electrical connector (2) to the brake fluid level sensor.
  6. Fill the master cylinder reservoir with brake fluid. Refer to Master Cylinder Reservoir Filling .
  7. Bleed the brake system. Refer to Hydraulic Brake System Bleeding .