GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Refer to Brake Dust Caution in the Preface section.

Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.

Important: After installation, calibrate the new EBCM to the tire size that is appropriate to the vehicle.


    Object Number: 550743  Size: SH

    Important: Thoroughly wash all contaminants from around the EHCU. The area around the EHCU must be free from loose dirt to prevent contamination of disassembled ABS components.

  1. Disconnect the electrical connectors from the EBCM (2).
  2. Remove the four T 25-TORX® mounting screws (1) that fasten the EBCM (2) to the BPMV (3).
  3. Remove the EBCM (2) from the BPMV (3). Removal may require a light amount of force.
  4. Important: Do not use a tool to pry the EBCM or the BPMV.

  5. Clean the BPMV (3) to EBCM (2) mounting surfaces with a clean cloth.

Installation Procedure

Important: Do not reuse the old mounting screws. Always install new mounting screws with the new EBCM.


    Object Number: 550743  Size: SH

    Important: Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.

  1. Install EBCM (2) on to the BPMV (3).
  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 four new T-25 TORX® screws (1) in the EBCM (2).
  4. Tighten
    Tighten the four T-25 TORX® screws to 5 N·m (39 lb in) in an X-pattern.

  5. Connect the electrical connectors to the EBCM (2).
  6. Revise the tire calibration using the Scan Tool Tire Size Calibration function.
  7. Refer to Control Module References for programming and setup information.