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Home >> GMC >> 2019 >> Sierra 2500 HD Base, 2D Pickup, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 2933 (Hybrid/EV Control System) >> Repair Instructions >> Generator Control Module Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2017 GMC Sierra 1500 and 2017 Chevrolet Silverado 1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disable the high voltage system. High Voltage Disabling
  2. Fig 1: Front End Sheet Metal Diagonal Brace
    GM4354534Courtesy of GENERAL MOTORS COMPANY
  3. Front End Sheet Metal Diagonal Brace Bolt 1 -Remove
  4. Retainer Clip 2 -Disengage
  5. Front End Sheet Metal Diagonal Brace 3 -Remove
  6. Fig 2: High Voltage Battery Pack Positive Cable And Starter Generator High Voltage Cable
    GM4354541Courtesy of GENERAL MOTORS COMPANY
  7. High Voltage Battery Pack Positive Cable Connector 2 -Disconnect
  8. Starter Generator High Voltage Cable Connector 3 -Disconnect
  9. Electrical Connector 4 -Disconnect
  10. Ground Terminal Fastener 1 -Remove
  11. Fig 3: Battery Positive Junction Block Cable
    GM4599180Courtesy of GENERAL MOTORS COMPANY
  12. Fuse Block Cover 1 -Remove
  13. Battery Positive Junction Block Cable Nut 2 -Remove
  14. Battery Distribution Engine Compartment Fuse Block Nut 3 -Remove
  15. Battery Positive Junction Block Cable 4 -Remove
  16. Fig 4: Generator Control Module Coolant Tank Hose Clamp
    GM4337985Courtesy of GENERAL MOTORS COMPANY
  17. Generator Control Module Coolant Tank Hose 2 @Generator Control Module-Disengage - Generator Control Module Coolant Tank Hose Replacement (Bottom L8B)Generator Control Module Coolant Tank Hose Replacement (Low Temp Radiator to Generator Control Module L8B)
  18. Fig 5: Generator Control Module Coolant Outlet Hose Clamp
    GM4338153Courtesy of GENERAL MOTORS COMPANY
  19. Generator Control Module Coolant Outlet Hose 2 @Generator Control Module-Disengage - Generator Control Module Coolant Outlet Hose Replacement (Starter Generator to Generator Control Module L8B)Generator Control Module Coolant Outlet Hose Replacement (Starter Generator to Drive Motor Battery Surge Tank Inlet Hose L8B)
  20. Fig 6: Generator Control Module
    GM4354544Courtesy of GENERAL MOTORS COMPANY
  21. Generator Control Module Mounting Nut 1 -Remove
  22. Generator Control Module 2 -Remove