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Home >> Buick >> 2018 >> LaCrosse Base >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Electric Converters and Controllers >> Hybrid/EV Control System >> Repair Instructions >> Generator Control Module Replacement >> Removal Procedure
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Removal Procedure

  1. GM4752569

    Drive Motor Power Inverter Module Cover (3) - Remove - Drive Motor Power Inverter Module Cover Replacement 

  2. GM4747900

    Drive Motor Power Inverter Module Shield (2) - Remove - Drive Motor Power Inverter Module Shield Replacement 

  3. Disable the high voltage system. High Voltage Disabling
  4. GM4752930
    NOTE:

    Cap or plug the coolant hose and the generator control module outlet pipe, so coolant does not contaminate any electrical connectors.

    Generator Control Module Coolant Pump Hose (2) @ Generator Control Module (1) - Remove - Generator Control Module Coolant Pump Hose Replacement (LHN)

  5. GM4752931
    NOTE:

    Cap or plug the coolant hose and the generator control module outlet pipe, so coolant does not contaminate any electrical connectors.

    Generator Control Module Coolant Hose (2) @ Generator Control Module (1) - Remove - Generator Control Module Coolant Hose Replacement (LHN Generator Control Module Coolant Hose to Generator Control Module)

  6. GM4753041

    High Voltage Electrical Connector (1) - Disconnect [2x]

  7. Electrical Connector (2) - Disconnect
  8. Engine Harness Ground Fastener (3) - Remove
  9. Engine Harness Ground Terminal (4) - Remove
  10. GM4751702

    Battery Positive Junction Block Cable Nut (2) @ Generator Control Module (3) - Remove

  11. Battery Positive Junction Block Cable (1) - Remove
  12. GM4753076

    Generator Control Module Bolt (1) - Remove [2x]

  13. Generator Control Module Nut (2) - Remove
  14. GM4753101

    Engine Control Module Bracket (2) - Reposition away

  15. Generator Control Module (1) - Remove