GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

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 four 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 two 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 two BPMV mounting bracket nuts (3) and one bolt located near the bottom and one 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 chasis.
  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 four 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. Install the four bolts (3) that connects the BPMV assembly (1) to the mounting bracket (2).
  4. Tighten
    Tighten the four bolts (3) that connect the BPMV (1) to the mounting bracket (2) to 10 N·m (84 lb. in.).


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

        • Tighten the lower two BPMV mounting bracket nuts (3) and bolt to 10 N·m (84 lb. in.).
        • Tighten the top nut (1) for BPMV mounting bracket (4) to strut tower to 3 N·m (26 lb. in.).

    Object Number: 385479  Size: SH

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

    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.

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


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

  12. Reconnect the ground strap between the EBCM assembly and the chasis.

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