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Home › Chevrolet › 2012 › Chevy Express H1500, Van Cargo › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine Controls And Fuel - 4.8L, 5.3L, 6.0L - Repair Instructions › Repair Instructions › Compressed Natural Gas Control Module Replacement › Removal Procedure

Removal Procedure

    WARNING:

    Refer to Battery Disconnect Warning .

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Remove the mid ship tank cover. Refer to Compressed Natural Gas Tank Cover Replacement - Midship Tank 
    4. Fig 1: FCM Electrical Connectors
    GM2563361Courtesy of GENERAL MOTORS COMPANY
  4. Remove the 3 electrical connectors from the FCM.
  5. Remove the 2 FGCM mounting bracket bolts and 2 nuts.
  6. Pull the FGCM out from behind the bracket while pulling the connectors through the bracket.
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