GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 S10 Pickup - 4WD 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Master Cylinder Replacement

Removal Procedure
  1. Apply the parking brake.

    2. Object Number: 177390 Size: SH
  2. Disconnect the brake pipes.
  3. Plug the pipes in order to prevent brake fluid loss or contamination.

    4. Object Number: 177372 Size: SH
  4. Remove the master cylinder nuts.
  5. Remove the master cylinder.

Installation Procedure

    Object Number: 177373 Size: SH
  1. Before installing the master cylinder, bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding .
  2. Install the master cylinder.

    3. Object Number: 177372 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.

  3. Install the master cylinder nuts.

    4. Tighten
    Tighten the master cylinder nuts to 36 N·m (27 lb ft).


    Object Number: 177390 Size: SH
  4. Connect the brake pipes.

    5. Tighten
    Tighten the pipe fittings to 17 N·m (13 lb ft).

  5. Bleed the brakes. Refer to Hydraulic Brake System Bleeding .