LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 2005 >> G6 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.5L (Lx9) - Introduction >> Repair Instructions >> Powertrain Control Module (PCM) Replacement >> Removal Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Removal Procedure

    Fig 1: View Of PCM
    GM1492079Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: It is necessary to record 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 percent. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5 000 km (3,000 mi) from the last engine oil change.
  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.

  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  3. Rotate the lever lock to the up position in order to release the connector.
  4. Disconnect the body harness electrical connector from the powertrain control module (PCM).
  5. Fig 2: View Of PCM Connectors
    GM1492080Courtesy of GENERAL MOTORS CORP.
  6. Rotate the lever lock to the up position in order to release the connector.
  7. Disconnect the engine harness electrical connectors from the PCM.
  8. Fig 3: Removing & Installing PCM
    GM1492082Courtesy of GENERAL MOTORS CORP.
  9. Release the retaining tab located in the battery box lower half using a small screwdriver or other suitable tool.
  10. Remove the PCM by lifting upward after releasing the tab.