GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Regal (China) (CNG) 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Master Cylinder Replacement

Removal procedure
  1. Disconnect brake pipes from the master cylinder.
  2. Disconnect fluid level sensor electrical connector.
  3. Remove master cylinder mounting nuts.
  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 in this section.

Installation Procedure
  1. Install the master cylinder reservoir. Refer to Master Cylinder Reservoir Replacement in this section.
  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 mounting nuts.

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

  4. Connect the fluid level sensor electrical connector.
  5. Connect the brake pipes to the master cylinder.

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

  6. Fill the master cylinder reservoir with brake fluid. Refer to Master Cylinder Reservoir Filling in this section.
  7. Bleed the brake system. Refer to Hydraulic Brake System Bleeding in this section.