GM Service Manual Online
For 1990-2009 cars only

Caution: Always use double walled steel brake pipe when replacing brake pipes. Always use the correct fasteners and the original routing when replacing brake pipes. Failure to properly route and fasten brake pipes may cause brake system failure.

Important: Maintain a 6 mm (1/4 in) clearance between parallel brake pipes.

Removal Procedure


    Object Number: 423702  Size: SH
  1. Disconnect the pipe from the fitting at the cross member bracket (6).
  2. Remove the retainer.
  3. Disconnect the brake pipe from each end of the hose fitting at the rear axle bracket (5).
  4. Remove the bolt which secures the hose to the rear axle bracket.
  5. Remove the hose.
  6. Remove the retainer (4) at the caliper bracket and disconnect the pipe from the hose on each side of the vehicle equipped with rear disc brakes. For vehicles equipped with rear drum brakes, disconnect the brake pipe(s) from the rear brakes.
  7. Remove the bolt (1) and washers (2) from the caliper hose fitting.
  8. Remove the the hose (3).

Installation Procedure


    Object Number: 423702  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.

  1. Install the hose (3) at the rear caliper(s) for vehicles equipped with rear disc brakes.
  2. Tighten
    Tighten the bolt (1) with the washers (2) to 44 N·m (32 lb ft).

  3. For vehicles equipped with rear drum brakes, install the brake pipes to the rear brakes.
  4. Install the brake pipe(s) and retainer(s) (4).
  5. Tighten
    Tighten the brake pipes to 23 N·m (17  lb ft).

    Important: The hose must not be twisted or contact any suspension components after installation.

  6. Secure the hose fitting (5) at the rear axle bracket.
  7. Tighten
    Tighten the bolt to 17 N·m (13 lb ft).

  8. Secure the brake pipe to the hose at the cross member (6) junction.
  9. Install the retainer (4).
  10. Bleed the brake hydraulic system. Refer to Hydraulic Brake System Bleeding .