2009 Pontiac G8 BaseFACTORY OEM SERVICE PROCEDURE

Installation Procedure

    Fig 1: Identifying ECM Retaining Clips
    GM1949890Courtesy of GENERAL MOTORS CORP.
  1. Install the ECM (2) to the ECM housing. Ensure the ECM retaining clips (1) are located correctly.
    2. Fig 2: Identifying ECM Electrical Connectors
    GM1994665Courtesy of GENERAL MOTORS CORP.
  2. Connect the ECM electrical connectors (2) and lock the connector lock levers (1) into place.
  3. Connect the battery negative cable to the battery. Refer to Battery Negative Cable Disconnection and Connection .
  4. Install the radiator air baffle and deflector. Refer to Radiator Air Upper Baffle and Deflector Replacement .
    5. NOTE: If the ECM is replaced, it is required to update the remaining engine oil life. If the replacement module is not programmed with the remaining engine oil life, the engine oil life will default to 100%. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5000 km (3,000 mi) from the last engine oil change.
  5. Program the ECM. Refer to Engine Control Module Programming and Setup .
  6. If you encounter an ECM programming error, with a display message of "Starting Disabled, Remove Key" on the driver information center, with a diagnostic test code (DTC) of P1631, perform the "10-Minute Relearn Procedure" found in Programming Theft Deterrent Control Module Programming and Setup. Refer to Theft Deterrent Control Module Programming and Setup .
  7. Turn OFF the ignition for at least 5 seconds after the programming event is complete.
  8. Perform the throttle learn procedure. Refer to Throttle Learn .
  9. Use the scan tool to clear all DTCs.
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.

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