GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 155154  Size: SH
  1. Remove the TCS motor pack 4-way electrical connector (3) from TCS modulator pack (2).
  2. Use the following procedure in order to remove four brake pipes (1):
  3. 2.1. Place a shop cloth on top of the TCS motor pack in order to catch any dripping fluid.
    2.2. Do not allow any brake fluid to enter the bottom of the motor pack or the electrical connectors.
    2.3. Remove the two pipes running from the ABS hydraulic modulator.
    2.4. Remove the two pipes running to the front wheel brakes.
    2.5. Plug the open brake pipes in order to prevent fluid loss and contamination.
  4. Remove the bolt (4) attaching the TCS hydraulic modulator/motor pack assembly (2) to the mounting bracket.
  5. Lean the TCS hydraulic modulator/motor pack assembly (2) forward and remove from the bracket.

Installation Procedure


    Object Number: 155154  Size: SH
  1. Install the TCS hydraulic modulator/motor pack assembly (2) into the bracket, making sure the unit is properly seated all the way down into the bracket.
  2. 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 bolt (4) attaching the TCS hydraulic modulator/motor pack assembly (2) to the mounting bracket.
  4. Tighten
    Tighten the bolt (4) to 9 N·m (80 lb in).

  5. Install the four brake pipes (1) to the TCS hydraulic modulator/motor pack assembly (2).
  6. Clean up any and all excess brake fuild drippings.
  7. Install the 4-way TCS motor pack electrical connector (3).
  8. Bleed the system. Refer to Hydraulic Brake System Bleeding in Brakes.