Removal Procedure
- Disconnect the electrical connector from the brake fluid level sensor.
- If you are performing repairs on a 3.4L, non ABS Impala, it is necessary to remove the bracket (1) from the master cylinder.
- Disconnect the brake pipes from the master cylinder.
- Plug the open brake pipe ends.
- Remove master cylinder mounting nuts.
- Remove the master cylinder from the vehicle.
- Drain the master cylinder reservoir of all brake fluid.
Important: Install a rubber cap or plug to the exposed brake pipe fitting ends in order to prevent brake fluid loss and contamination.
Installation Procedure
- Bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding .
- Install the master cylinder to the vacuum brake booster.
- Install the master cylinder mounting nuts.
- Remove the plugs from the brake pipes
- Connect the brake pipes to the master cylinder.
- If you are performing repairs on a 3.4L, non ABS Impala, it is necessary to install the bracket (1) to the master cylinder.
- Connect the electrical connector to the brake fluid level sensor.
- Bleed the brake system. Refer to Hydraulic Brake System Bleeding .
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.
Tighten
Tighten the master cylinder mounting nuts to 25 N·m (18 lb ft).
Tighten
Tighten the brake pipe fittings at the master cylinder to 15 N·m
(11 lb ft).
