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Home >> GMC >> 2023 >> Hummer EV Edition 1 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel Trim And Console Trim >> Repair Instructions >> Instrument Panel Wiring Harness Replacement >> Removal Procedure

Removal Procedure

  1. Front Trim Finish Compartment - Remove - Front Trim Finish Compartment Removal and Installation
  2. WARNING:

    Always ensure the Battery Maintenance Mode is inactive before disconnecting the 12 volt battery. This mode can be active with the ignition off, regardless of whether the vehicle charging cord is plugged in or not. When this mode is active, the on-board high voltage battery charger will energize the 12 volt battery cables and charge the 12 volt battery. Disconnecting the battery cables while this mode is active may result in an electrical shock or a burn from hot battery cable leads.

  3. Check the 12 volt battery voltage with a digital multimeter before disconnecting any battery cables leads. If the voltage is 13.5 volts or above, the Battery Maintenance Mode is active. The technician must wait for the T18 battery charger to deactivate before disconnecting the battery negative cable. Charging System Description and Operation
  4. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  5. GM5810472Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Left side shown, right side similar.
    • Use a flat bladed plastic trim tool.

    Front Fender Ornamentation Vent Bolt - Left Side and Right Side (2) - Remove [2x]

  6. Release the retainers.
  7. Front Fender Ornamentation Vent- Left Side and Right Side (1) - Remove [2x]
  8. GM5810476Courtesy of GENERAL MOTORS COMPANY

    Using the appropriate trim tool, remove the windshield wiper arm finish caps (1) from the windshield wiper arms (3).

  9. Windshield Wiper Arm Nut (2) - Remove [3x]
  10. Using the appropriate tool, remove the windshield wiper arms (3).
  11. GM5814927Courtesy of GENERAL MOTORS COMPANY

    Air Inlet Grille Panel Retainer (1) - Remove [4x]

  12. Windshield Washer Nozzle Hose - Disconnect
  13. Air Inlet Grille Panel (2) - Remove
  14. GM5814931Courtesy of GENERAL MOTORS COMPANY

    Windshield Wiper System Module Shield (1) - Remove

  15. GM5819233Courtesy of GENERAL MOTORS COMPANY

    Front End Sheet Metal Cross Panel Bolt (1) - Remove [4x]

  16. Front End Sheet Metal Cross Brace (2) - Remove
  17. GM5816894Courtesy of GENERAL MOTORS COMPANY

    Air Inlet Duct Nut (1) - Remove

  18. GM5816896Courtesy of GENERAL MOTORS COMPANY

    Air Inlet Duct (1) - Remove

  19. GM5819236Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Heater and Blower Module Bolt (1) - Remove [2x]

  20. GM5819162Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Carrier (1) - Remove - Instrument Panel Carrier Replacement 

  21. GM5795183Courtesy of GENERAL MOTORS COMPANY

    Floor Front Air Outlet Duct Retainer (1) - Remove

  22. GM5775694Courtesy of GENERAL MOTORS COMPANY

    Release the insulator retainers with a suitable plastic trim tool.

  23. Instrument Panel Lower Insulator Retainer (1) - Remove [4x]
  24. Instrument Panel Lower Trim Panel Insulator (2) - Remove
  25. GM5814867Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness Retainer (1) - Remove [2x]

  26. GM5814868Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Outer Air Outlet Bolt (1) - Remove

  27. GM5814869Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Outer Air Outlet Duct Retainer (1) - Remove

  28. Wiring Harness Retainer (2) - Remove
  29. GM5814871Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness Retainer (1) - Remove

  30. Instrument Panel Outer Air Outlet Bolt (2) - Remove [2x]
  31. GM5814873Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Outer Air Outlet Bolt (1) - Remove [2x]

  32. GM5814875Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Outer Air Outlet Duct (1) - Remove

  33. GM5784710Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Front Seat- Left Side and Right Side (2) - Remove [2x] - Front Seat Removal and Installation

  34. GM5777893Courtesy of GENERAL MOTORS COMPANY

    Reposition the left side and right side front side door weatherstrips as necessary.

  35. Use a flat bladed plastic tool at the front of the side door sill garnish molding (1) to disengage the retaining clips from the front side door sill garnish molding (2) to remove the front side door sill garnish molding.
  36. NOTE:

    Left side shown, right side similar.

  37. Side Door Sill Garnish Molding- Left Side and Right Side (1) - Loosen [2x]
  38. GM5777892Courtesy of GENERAL MOTORS COMPANY

    Pull backwards from the top of the front side door sill garnish molding (1) to disengage the two clips on the forward vertical wall.

  39. NOTE:

    Left side shown, right side similar.

  40. Front Side Door Sill Garnish Molding- Left Side and Right Side (1) - Remove [2x]
  41. GM6120138Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Wiring Harness Ground Bolt (1) - Remove [2x]

  42. NOTE:
    • Note the location and routing of the instrument panel wiring harness prior to removal to ensure proper installation.
    • Quantity of connectors may vary based on option content.
  43. Disconnect the electrical connectors. (2) [3x]
  44. GM6120168Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Note the location and routing of the instrument panel wiring harness prior to removal to ensure proper installation.
    • Quantity of connectors may vary based on option content.

    Disconnect the electrical connectors. (1) [4x]

  45. GM6120197Courtesy of GENERAL MOTORS COMPANY

    Reposition the front floor panel mat.

  46. Driver Footrest Retainer (1) - Remove
  47. Driver Footrest Nut (2) - Remove [2x]
  48. GM6120198Courtesy of GENERAL MOTORS COMPANY

    Driver Footrest Bracket (1) - Remove

  49. GM6120440Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Note the location and routing of the instrument panel wiring harness prior to removal to ensure proper installation.
    • Quantity of connectors may vary based on option content.
    • Quantity of retainers may vary based on option content.

    Disconnect the electrical connectors and release the wiring harness retainers as necessary. (1) [4x]

  50. Instrument Panel Wiring Harness Ground Bolt (2) - Remove [2x]
  51. GM6120456Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Note the location and routing of the instrument panel wiring harness prior to removal to ensure proper installation.
    • Quantity of connectors may vary based on option content.
    • Quantity of retainers may vary based on option content.

    Disconnect the wiring harness retainers. (1) [3x]

  52. Disconnect the electrical connectors. (2) [2x]
  53. GM5823947Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Tie Bar Bolt (1) - Remove [2x]

  54. GM5823950Courtesy of GENERAL MOTORS COMPANY

    Body Hinge Pillar Outer Panel Hole Plug (1) - Remove [4x]

  55. Instrument Panel Tie Bar Bolt (2) - Remove [4x]
  56. GM5823951Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Tie Bar Bolt (1) - Remove [3x]

  57. Heater and Air Conditioning Evaporator and Blower Module Bolt (2) - Remove [4x]
  58. GM5823952Courtesy of GENERAL MOTORS COMPANY

    Heater and Air Conditioning Evaporator and Blower Module Bolt (1) - Remove [2x]

  59. GM5823953Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Tie Bar Brace Bolt (1) - Remove [2x]

  60. GM6120492Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Using an appropriate tool, depress the left side and right side retaining tabs (1) downward to allow the removal of the instrument panel tie bar.

  61. GM5823954Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • The wiring harness will remain attached to the instrument panel tie bar (1).
    • Some components not shown for graphic clarity.

    Support the heater and air conditioning evaporator and blower module prior to removal of the instrument panel tie bar.

  62. With the aid of an assistant, remove the instrument panel tie bar (1) from the vehicle.
  63. GM6126812Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Note the location and routing of the instrument panel wiring harness prior to removal to ensure proper installation.
    • Quantity of clips and routing of the wiring harness may vary based on option content.

    Data Link Connector Bolt (3) - Remove [2x]

  64. Disconnect the electrical connectors and release the wiring harness retainers as necessary.
  65. Remove the instrument panel wiring harness (1) from the instrument panel tie bar (2).