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Home >> Buick >> 2006 >> Lucerne CX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.8L - Introduction (2 Of 2) >> Repair Instructions >> Powertrain Control Module Replacement >> Removal Procedure
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Removal Procedure

  1. Using a scan tool, retrieve the percentage of remaining engine oil and automatic transaxle fluid life. Record the remaining engine oil and transaxle fluid life.
  2. Ensure that the ignition is in the OFF position.
  3. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
    4. Fig 1: Locating Intake Manifold Cover
    GM1688912Courtesy of GENERAL MOTORS CORP.
  4. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  5. Disconnect the engine harness electrical connector from the mass air flow/intake air temperature (MAF/IAT) sensor.
    6. Fig 2: Identifying Positive Crankcase Ventilation (PCV) Tube
    GM1685531Courtesy of GENERAL MOTORS CORP.
  6. Remove the positive crankcase ventilation (PCV) tube from the air cleaner outlet duct.
    7. Fig 3: View Of Air Cleaner Outlet Duct & Throttle Body
    GM1688934Courtesy of GENERAL MOTORS CORP.
  7. Loosen the air cleaner outlet duct clamp at the throttle body.
  8. Remove the air cleaner outlet duct from the throttle body.
    9. Fig 4: Identifying Air Cleaner Upper Housing
    GM1670787Courtesy of GENERAL MOTORS CORP.
  9. Disengage the lower housing clips (1).
  10. Disengage the upper housing front tabs from the lower housing.
  11. Remove the air cleaner upper housing.
    12. Fig 5: Identifying Air Cleaner Lower Housing
    GM1664479Courtesy of GENERAL MOTORS CORP.
  12. Disengage the engine harness electrical connector lever locks at the PCM.
  13. Remove the engine harness electrical connectors from the PCM.
  14. Remove the PCM from the air cleaner lower housing.
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