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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 >> Installation Procedure

Installation Procedure

  1. GM6126812Courtesy of GENERAL MOTORS COMPANY

    Install the instrument panel wiring harness (1) to the instrument panel tie bar (2).

  2. Connect the electrical connectors and install the wiring harness retainers as necessary.
  3. CAUTION:

    Refer to Fastener Caution .

  4. Data Link Connector Bolt (2) - Install and tighten [2x] - Fastener Specifications 
  5. GM6120492Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Using an appropriate tool, move the left side and right side retaining tabs (1) back to their original positions to allow the retention of the instrument panel tie bar.

  6. 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.

    With the aid of an assistant, position the instrument panel tie bar (1) into the vehicle.

  7. GM5823953Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Tie Bar Brace Bolt (1) - Install and tighten [2x] - Fastener Specifications 

  8. GM5823952Courtesy of GENERAL MOTORS COMPANY

    Heater and Air Conditioning Evaporator and Blower Module Bolt (1) - Install and tighten [2x] - Fastener Specifications 

  9. GM5823951Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Tie Bar Bolt (1) - Install and tighten [3x] - Fastener Specifications 

  10. Heater and Air Conditioning Evaporator and Blower Module Bolt (2) - Install and tighten [4x] - Fastener Specifications 
  11. GM5823950Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Tie Bar Bolt (2) - Install and tighten [4x] - Fastener Specifications 

  12. Body Hinge Pillar Outer Panel Hole Plug (1) - Install [4x]
  13. Remove the support from the heater and air conditioning evaporator and blower module.
  14. 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.

    Connect the electrical connectors. (2) [2x]

  15. Connect the wiring harness retainers. (1) [3x]
  16. 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.

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

  17. Instrument Panel Wiring Harness Ground Bolt (1) - Install and tighten [2x] - Ground Repair
  18. GM6120198Courtesy of GENERAL MOTORS COMPANY

    Driver Footrest Bracket (1) - Install

  19. GM6120197Courtesy of GENERAL MOTORS COMPANY

    Driver Footrest Retainer (1) - Install and tighten - Fastener Specifications 

  20. Driver Footrest Nut (2) - Install and tighten [2x] - Fastener Specifications 
  21. Move the front floor panel mat back into position.
  22. GM6120168Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Wiring Harness - Move into position

  23. NOTE:

    Quantity of connectors may vary based on option content.

  24. Connect the electrical connectors. (1) [4x]
  25. GM6120138Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Wiring Harness - Move into position

  26. NOTE:

    Quantity of connectors may vary based on option content.

  27. Connect the electrical connectors. (2) [3x]
  28. Instrument Panel Wiring Harness Ground Bolt (1) - Install and tighten [2x] - Ground Repair
  29. GM5777892Courtesy of GENERAL MOTORS COMPANY

    Starting at the front of the front side door sill garnish molding (1) engage the 2 retaining clips on the forward vertical wall on both sides of the vehicle.

  30. NOTE:

    Left side shown, right side similar.

  31. Front Side Door Sill Garnish Molding- Left Side and Right Side (1) - Install [2x]
  32. GM5777893Courtesy of GENERAL MOTORS COMPANY

    Engage the retaining clips at the front of the side door sill garnish moldings (1) on both sides of the vehicle.

  33. NOTE:

    Left side shown, right side similar.

  34. Side Door Sill Garnish Molding- Left Side and Right Side (1) - Install [2x]
  35. Install the front of the side door weatherstrips as necessary.
  36. GM5784710Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

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

  37. GM5814875Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Outer Air Outlet Duct (1) - Install

  38. GM5814873Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Outer Air Outlet Bolt (1) - Install and tighten [2x] - Fastener Specifications

  39. GM5814871Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Outer Air Outlet Bolt (2) - Install and tighten [2x] - Fastener Specifications

  40. Wiring Harness Retainer (1) - Install
  41. GM5814869Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness Retainer (2) - Install

  42. Instrument Panel Outer Air Outlet Duct Retainer (1) - Install
  43. GM5814868Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Outer Air Outlet Bolt (1) - Install and tighten - Fastener Specifications

  44. GM5814867Courtesy of GENERAL MOTORS COMPANY

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

  45. GM5775694Courtesy of GENERAL MOTORS COMPANY

    Instrument Panel Lower Trim Panel Insulator (2) - Install

  46. Instrument Panel Lower Insulator Retainer (1) - Install [4x]
  47. GM5795183Courtesy of GENERAL MOTORS COMPANY

    Floor Front Air Outlet Duct Retainer (1) - Install

  48. GM5819162Courtesy of GENERAL MOTORS COMPANY

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

  49. GM5819236Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Heater and Blower Module Bolt (1) - Install and tighten [2x] - Fastener Specifications

  50. GM5816896Courtesy of GENERAL MOTORS COMPANY

    Air Inlet Duct (1) - Install

  51. GM5816894Courtesy of GENERAL MOTORS COMPANY

    Air Inlet Duct Nut (1) - Install and tighten - Fastener Specifications

  52. GM5819233Courtesy of GENERAL MOTORS COMPANY

    Front End Sheet Metal Cross Brace (2) - Install

  53. Front End Sheet Metal Cross Panel Bolt (1) - Install and tighten [4x] - Fastener Specifications
  54. GM5814931Courtesy of GENERAL MOTORS COMPANY

    Windshield Wiper System Module Shield (1) - Install

  55. GM5814927Courtesy of GENERAL MOTORS COMPANY

    Air Inlet Grille Panel (2) - Install

  56. Windshield Washer Nozzle Hose - Connect
  57. Air Inlet Grille Panel Retainer (1) - Install [4x]
  58. GM5810476Courtesy of GENERAL MOTORS COMPANY

    Clean the windshield wiper transmission pivot shaft splines with a soft wire brush before installing the windshield wiper arms (3).

  59. Position the windshield wiper arms (3) on the windshield wiper transmission pivot shafts.
  60. Windshield Wiper Arm Nut (2) - Install and tighten [3x] - Fastener Specifications
  61. Windshield Wiper Arm Finish Cap (1) - Install [3x]
  62. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
  63. GM5810483Courtesy of GENERAL MOTORS COMPANY

    If required, realign the windshield wipers to their respective alignment circles (1) on the windshield.

  64. Lubricate the windshield with clean washer fluid.
  65. Run the windshield wipers for two complete cycles then turn off the windshield wipers.
  66. Ensure the windshield wipers are in the full park position.
  67. GM5810472Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Front Fender Ornamentation Vent- Left Side and Right Side (1) - Install [2x]

  68. Front Fender Ornamentation Vent Bolt - Left Side and Right Side (2) - Install and tighten [2x] - Fastener Specifications
  69. Front Trim Finish Compartment - Install - Front Trim Finish Compartment Removal and Installation