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Home >> Chevrolet >> 2009 >> Uplander Base, 3.9 M >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.9L - Introduction (2 Of 2) >> Repair Instructions >> Engine Control Module Replacement >> Removal Procedure
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Removal Procedure

  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
    2. Fig 1: Identifying Powertrain Control Module (PCM)
    GM1544730Courtesy of GENERAL MOTORS CORP.
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  3. Remove the left sheet metal diagonal brace. Refer to Front End Sheet Metal Diagonal Brace Replacement (Chevrolet) or Front End Sheet Metal Diagonal Brace Replacement (Pontiac) .
  4. Loosen the air cleaner cover screws and remove the cover (1) from the air cleaner assembly (3).
  5. Disconnect the engine harness electrical connectors (4) from the ECM.
  6. Remove the ECM (2) from the air cleaner cover.
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