2022 GMC Hummer EVFACTORY OEM SERVICE PROCEDURE

Installation Procedure

  1. GM5835485Courtesy of GENERAL MOTORS COMPANY

    Power Steering Control Module Wiring Harness (4) - Install

  2. CAUTION:

    Refer to Fastener Caution

  3. Steering Gear Bolt (3) - Install and tighten [4x] - Fastener SpecificationsΒ 
  4. Engage the 4 wiring harness retainers.
  5. Connect the electrical connectors. (1)
  6. GM5810317Courtesy of GENERAL MOTORS COMPANY

    Underbody Skid Shield (3) - Install

  7. High Voltage Battery Tray Reinforcement Bolt (2) - Install and tighten - Fastener Specifications
  8. Underbody Skid Rear Shield Bolt (1) - Install and tighten [6x] - Fastener Specifications
  9. GM5810304Courtesy of GENERAL MOTORS COMPANY

    Underbody Splash Shield (3) - Install

  10. Connect the electrical connector.
  11. Underbody Splash Shield Bolt- Lower (2) - Install and tighten [3x] - Fastener Specifications
  12. Underbody Splash Shield Bolt- Upper (1) - Install and tighten [6x] - Fastener Specifications
  13. GM5788843Courtesy of GENERAL MOTORS COMPANY

    Front Bumper Fascia (1) - Install - Front Bumper Fascia Removal and Installation

Factory Service Tools

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When to See a Mechanic

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

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