2022 GMC Hummer EVFACTORY OEM SERVICE PROCEDURE

Installation Procedure

  1. GM5905774Courtesy of GENERAL MOTORS COMPANY

    High Voltage Connector (3) - Install [2x]

  2. Drive Motor Power Inverter Module Bracket (2) - Install
    3. CAUTION:

    Refer to Fastener Caution .

  3. Drive Motor Power Inverter Module Cooling Inlet Hose Bracket Bolt (1) - Install and tighten [2x] - Fastener Specifications 
  4. GM5864769Courtesy of GENERAL MOTORS COMPANY

    Battery Positive and Negative Cable (3) - Install

  5. Install the battery positive and negative cable retainers (2).
  6. Auxiliary Battery Positive Cable Nut (1) - Install and tighten - Fastener Specifications
  7. GM5864765Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Battery Charger (2) - Install

  8. Drive Motor Power Distribution Control Module Bolt (1) - Install and tighten [4x] - Fastener Specifications 
  9. GM5864764Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Starter Generator Negative Ground Cable (2) - Install [2x]

  10. Battery Negative Cable Nut (1) - Install and tighten [2x] - Fastener Specifications
  11. GM5870386Courtesy of GENERAL MOTORS COMPANY

    Battery Positive and Negative Cable Extension Cable (4) - Install

  12. Battery Positive Cable Shield Bolt (3) - Install and tighten [2x] - Fastener Specifications
  13. Install the battery positive and negative cable extension cable retainers (2).
  14. Connect the electrical connector. (1)
  15. GM5870384Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    High Voltage Battery Positive Cable (3) - Install

  16. Battery Positive Cable Shield Bolt (2) - Install and tighten [2x] - Fastener Specifications
  17. Connect the electrical connectors. (1)
  18. GM5870385Courtesy of GENERAL MOTORS COMPANY

    Install the high voltage battery positive cable retainer (1).

  19. GM5870383Courtesy of GENERAL MOTORS COMPANY

    Drive Motor Power Distribution Control Module Protector (2) - Install

  20. Drive Motor Power Distribution Control Module Bolt (1) - Install and tighten [3x] - Fastener Specifications 
  21. GM5905773Courtesy of GENERAL MOTORS COMPANY

    Drive Motor Power Distribution Control Module Hose (6) - Install

  22. Install the drive motor power distribution control module hose retainers (5).
  23. Rear Electric Drive Transmission Module Coolant Hose (4) - Connect
  24. Drive Motor Power Distribution Control Module Hose (3) - Connect
  25. Drive Motor Power Inverter Module Nut (2) - Install
  26. Drive Motor Power Inverter Module Bolt (1) - Install and tighten - Fastener Specifications
  27. GM5902903Courtesy of GENERAL MOTORS COMPANY

    Rear Suspension Cradle (1) - Install - Rear Suspension Cradle Removal and Installation

  28. Run all necessary programming and setup procedures. Control Module References
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.