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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 680 (ANTI-LOCK BRAKE SYSTEM)REPAIR INSTRUCTIONSBRAKE PRESSURE MODULATOR VALVE (BPMV) REPLACEMENTREMOVAL PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the negative battery cable.

    Important:  The area around the EHCU MUST be free from loose dirt to prevent contamination of disassembled ABS components.

  2. Thoroughly wash all contaminants from around the EHCU.
    Fig 1: Locating EHCU
    G01669350Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the 3 electrical harness connectors from the EBCM.

    Important:  Make sure that brake lines are tagged and kept in order for proper reassembly.

  4. Disconnect 5 brake lines from the BPMV.
  5. Remove the bolts (4) securing the EHCU mounting bracket (3) to the frame rail (5).
  6. Remove the EHCU (1) from the vehicle.
  7. Remove the bolts (4) securing the BPMV mounting bracket (3) to the BPMV (1).
  8. Disconnect the 2 way ABS pump motor connector.
  9. Remove the T-25 TORX® bolts from the EBCM (2).
    NOTE: Do not use a tool to pry the EBCM or the BPMV. Excessive force will damage the EBCM.

    Important:  Do not reuse the EBCM mounting bolts. Always install new bolts.

  10. Remove the EBCM (2) from the BPMV (1). Removal may require a light amount of force.
  11. Clean the EBCM to BPMV mounting surfaces with a clean cloth.
    Fig 2: EBCM & BPMV
    G01669351Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.