2004 Chevrolet ClassicFACTORY OEM SERVICE PROCEDURE

Removal Procedure

NOTE: To prevent equipment damage, never connect or disconnect the wiring harness connection from the EBCM with the ignition switch in the ON position.
    Fig 1: Identifying Connector Position Assurance (CPA) Locking Tab And Connector Sliding Cover Lock Tab
    GM393786Courtesy of GENERAL MOTORS CORP.
  1. Raise and support the vehicle on a suitable hoist. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the left engine splash shield.
  3. Remove the Connector Position Assurance (CPA) (2) from the connector lock tab (1).
  4. Push the lock tab (1) down and then move the sliding connector cover to the open position.
    5. Fig 2: Identifying EBCM & EBCM Harness Connector
    GM567224Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the EBCM harness connector (2) from the EBCM (1).
  6. Brush off any dirt or debris that has accumulated on the EBCM/BPMV assembly.
    7. Fig 3: View Of EBCM/EBTCM
    GM527343Courtesy of GENERAL MOTORS CORP.
  7. Remove the 4 EBCM to BPMV screws.
    8. IMPORTANT:
    • Do not pry apart using a tool. Be careful not to damage the BPMV surface.
    • Care must be taken not to damage the solenoid valves when the EBCM is removed from the BPMV.
  8. Remove the EBCM (1) from the BPMV (2) by gently pulling apart until separated.
Factory Service Tools

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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.