LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2018 >> CT6 Plug-In >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Converters and Controllers >> Hybrid/EV Control System >> Repair Instructions >> Accessory DC Power Control Module Replacement >> Removal Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Removal Procedure

  1. Disable the high voltage system. High Voltage Disabling
  2. GM4248724Courtesy of GENERAL MOTORS COMPANY

    Front Wheelhouse Panel Brace - Front (2) - Remove - Front Wheelhouse Panel Brace Replacement (Rear)Front Wheelhouse Panel Brace Replacement (Front)

  3. GM4244690Courtesy of GENERAL MOTORS COMPANY

    Radiator Inlet Hose (2) - Remove - Radiator Inlet Hose Replacement (LTG without HP9)Radiator Inlet Hose Replacement (LGW)Radiator Inlet Hose Replacement (LGX)Radiator Inlet Hose Replacement (LTG with HP9)

  4. GM4487918Courtesy of GENERAL MOTORS COMPANY

    Generator Control Module Coolant Radiator Hose (2) - Remove - Generator Control Module Coolant Radiator Hose Replacement

  5. GM4489007Courtesy of GENERAL MOTORS COMPANY

    Drive Motor Generator Control Module Radiator Outlet Hose (2) - Remove -

  6. GM4488981Courtesy of GENERAL MOTORS COMPANY

    Retainer (2) - Disengage [2x]

  7. Electrical Connector (1) - Disconnect
  8. GM4488984Courtesy of GENERAL MOTORS COMPANY

    Accessory DC Power Control Module High Voltage Connector Protector Bolt (1) - Remove

  9. GM4488987Courtesy of GENERAL MOTORS COMPANY

    Accessory DC Power Control Module High Voltage Connector Protector Bolt (1) - Remove [2x]

  10. Reposition the accessory DC power control module high voltage connector protector (2), to access the accessory DC power control module mounting bolt.
  11. GM4488993Courtesy of GENERAL MOTORS COMPANY

    Accessory DC Power Control Module Bolt (1) - Remove

  12. GM4522884Courtesy of GENERAL MOTORS COMPANY

    Accessory DC Power Control Module Bracket (3) - Remove - Accessory DC Power Control Module Bracket Replacement 

  13. GM4488992Courtesy of GENERAL MOTORS COMPANY

    Accessory DC Power Control Module Bolt (1) - Remove

  14. GM4487166Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) - Disengage

  15. Protective Cap (3) - Remove
  16. Generator Cable Fastener (2) - Remove
  17. Generator Cable (4) - Remove
  18. GM4488988Courtesy of GENERAL MOTORS COMPANY

    Protective Cap (2) - Remove

  19. Ground Cable Nut (3) - Remove
  20. Ground Cable (1) - Remove
  21. GM4488995Courtesy of GENERAL MOTORS COMPANY

    Accessory DC Power Control Module Bolt (1) - Remove [2x]

  22. Raise the accessory DC power control module (2) to access the engine wiring harness connector.
  23. GM4488996Courtesy of GENERAL MOTORS COMPANY

    Accessory DC Power Control Module (2) - Reposition

  24. Electrical Connector (1) - Disconnect
  25. GM5086384Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Shown out of vehicle for graphic clarity.

    Accessory DC Power Control Module High Voltage Connector Protector (1) - Remove

  26. Accessory DC Power Control Module (2) - Remove
  27. GM4489198Courtesy of GENERAL MOTORS COMPANY

    Disconnect and transfer the high voltage extension cable (1) to the NEW accessory DC power control module.