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Home >> Pontiac >> 2008 >> G8 Base >> Repair and Diagnosis >> Brakes >> Anti-Lock Brake System, Traction Control System & Stability Control System >> Repair Instructions >> Brake Pressure Modulator Valve Assembly Replacement >> Removal Procedure
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Removal Procedure

    CAUTION: Refer to Brake Fluid Caution .
    CAUTION: Refer to Brake Fluid Irritant Caution .
    CAUTION: For safety reasons, the brake pressure modulator valve assembly must not be repaired, the complete unit must be replaced. With the exception of the EBCM, no screws on the brake pressure modulator valve assembly may be loosened. If screws are loosened, it will not be possible to get the brake circuits leak-tight and personal injury may result.
    NOTE: Refer to Adding Fluid to the Brake System Notice .
    NOTE: Refer to Brake Fluid Effects on Paint and Electrical Components Notice .
    IMPORTANT: If the electronic brake control module (EBCM) or brake pressure modulator valve (BPMV) is to replaced under manufacturer's warranty, do not disassemble the EBCM/BPMV assembly. If the EBCM or BPMV is faulty, replace the EBCM/BPMV assembly.
    IMPORTANT: The BPMV is not a separate serviceable component. If the BPMV is faulty, replace the EBCM/BPMV as an assembly.
  1. Turn the key to the ignition OFF position.
    2. IMPORTANT: The area around the EBCM/BPMV assembly must be free from loose dirt to prevent contamination of disassembled ABS components.
  2. Clean the BPMV and brake pipes.
  3. Place a clean suitable container under the BPMV.
  4. Remove the master cylinder reservoir cap.
    5. Fig 1: Identifying Master Cylinder Reservoir
    GM1943726Courtesy of GENERAL MOTORS CORP.
  5. Siphon the brake fluid out of the master cylinder reservoir (1) using a hand vacuum pump (2).
    6. Fig 2: Identifying BPMV, Master Cylinder & Wheel Brake Pipes
    GM1943628Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Record the location of all brake pipes to the EBCM/BPMV assembly as an aid during installation.
  6. Remove the two master cylinder brake pipes (3) from the BPMV (1).
    7. IMPORTANT: Install a rubber cap or plug to the master cylinder brake pipes (3) in order to prevent fluid loss and contamination.
  7. Plug the master cylinder brake pipes (3).
  8. Remove the four wheel brake pipes (2) from the BPMV (1).
    9. IMPORTANT: Install a rubber cap or plug to the wheel brake pipes (2) in order to prevent fluid loss and contamination.
  9. Plug the wheel brake pipes (2).
  10. Clean any brake fluid spillage from the BPMV (1).
    11. Fig 3: Identifying EBCM & Electrical Connector
    GM1943629Courtesy of GENERAL MOTORS CORP.
  11. Rotate the EBCM connector tab (2) up to the unlocked position.
    12. NOTE: To prevent equipment damage, never connect or disconnect the wiring harness connection from the EBCM with the ignition switch in the ON position.
  12. Disconnect the EBCM electrical connector (1) and position out of the way.
    13. Fig 4: Identifying EBCM/BPMV Assembly To EBCM/BPMV Assembly Bracket Retaining Nuts
    GM1943627Courtesy of GENERAL MOTORS CORP.
  13. Remove the EBCM/BPMV assembly to EBCM/BPMV assembly bracket retaining nuts (1).
  14. Remove the EBCM/BPMV assembly (2) from the EBCM/BPMV assembly bracket (3).
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