GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

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.

Caution: For safety reasons, the Brake Pressure Modulator Valve (BPMV) must not be repaired; the complete unit must be replaced. With the exception of the EBCM/EBTCM, no screws may be loosened. If screws are loosened, it will not be possible to get the brake circuits leak-tight and personal injury may result.


    Object Number: 393786  Size: SH
  1. Turn the ignition switch to the OFF position.
  2. Remove the attaching bolts for the cruise control module.
  3. Swing the cruise control module off to the side.
  4. Disengage the red locking tab from the connector (1).
  5. Push down lock tab (1) and then move sliding connector cover (2) to the open position.
  6. Disconnect the EBCM harness connector.

  7. Object Number: 385481  Size: SH

    Important: Note the locations of the brake pipes in order to aid in installation.

  8. Disconnect the wheel cylinder brake pipes (1) from the BPMV (2).
  9. Swing the 4 wheel cylinder brakes pipes out of the way only after covering the open pipes to avoid dripping or being contaminated.

  10. Object Number: 385479  Size: SH
  11. Disconnect the master cylinder brake pipes (2) from the BPMV (4).
  12. It is not necessary to remove the brake pipes (2) from the master cylinder (1).
  13. Swing the 2 master cylinder brake pipes out of the way only after covering the open pipes to avoid dripping or being contaminated.

  14. Object Number: 394422  Size: SH
  15. Remove the 2 BPMV mounting bracket nuts (3) and 1 bolt located near the bottom and 1 nut (1) located at the top of the BPMV mounting bracket (4) to the strut tower.
  16. Disconnect the ground strap between the EBCM assembly and the chassis.
  17. Remove the BPMV mounting bracket (4) and EBCM assembly (2) from the vehicle.

  18. Object Number: 307967  Size: SH

    Notice: When removing the brake pressure modulator valve, protect the vehicle exterior from possible brake fluid spillage. Brake fluid can cause damage to painted surfaces.

  19. Remove the 4 bolts (3) that connect the BPMV (1) to the mounting bracket (2).
  20. Remove EBCM if replacing the BPMV only. Refer to Electronic Brake Control Module Replacement .

Installation Procedure


    Object Number: 307967  Size: SH
  1. Install EBCM onto the BPMV (1) if replacing the BPMV only. Refer to Electronic Brake Control Module Replacement .
  2. Install BPMV and EBCM as an assembly (1) to the mounting bracket (2).
  3. 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.

  4. Install the 4 bolts (3) that connects the BPMV assembly (1) to the mounting bracket (2).
  5. Tighten
    Tighten the 4 bolts (3) that connect the BPMV (1) to the mounting bracket (2) to 10 N·m (89 lb in).


    Object Number: 394422  Size: SH
  6. Install the BPMV bracket (4) to the strut tower.
  7. Install the 1 bolt and 3 nuts that attach the BPMV mounting bracket (4) to the strut tower.
  8. Tighten

        • Tighten the lower 2 BPMV mounting bracket nuts (3) and bolt to 10 N·m (89 lb in).
        • Tighten the top nut (1) for BPMV mounting bracket (4) to strut tower to 3 N·m (27 lb in).

    Object Number: 385479  Size: SH

    Caution: Make sure brake pipes are correctly connected to brake pressure modulator valve. If brake pipes are switched by mistake, wheel lockup will occur and personal injury may result. The only two ways this condition can be detected are by using a Scan Tool or by doing an Antilock stop.

    Important: If a new BPMV is being installed, remove the shipping plugs from the valve openings during the next few steps when ready .

  9. Install the master cylinder brake pipes (2) into the BPMV (4).
  10. Tighten
    Tighten the master cylinder brake pipe fittings to 24 N·m (18 lb ft).


    Object Number: 385481  Size: SH
  11. Install the wheel cylinder brake pipes (1) on the BPMV (2).
  12. Tighten
    Tighten all 4 wheel cylinder brake pipe fittings to 24 N·m (18 lb ft).

  13. Re-connect the ground strap between the EBCM assembly and the chassis.

  14. Object Number: 393786  Size: SH
  15. Connect the EBCM harness connector.
  16. Push down lock tab (1) and then move sliding connector cover (2) back in home position to lock.
  17. Insert red locking tab back in place.
  18. Reinstall the cruise control module.
  19. When all procedures have been completed, the automated ABS bleed procedure is required. Refer to Antilock Brake System Automated Bleed Procedure .