LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2024 >> Hummer EV 2 >> Repair and Diagnosis >> Body & Frame >> Towing Systems >> TRAILERING Systems >> Repair Instructions >> Trailer Brake Control Module Replacement >> Removal Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Removal Procedure

    WARNING:

    Always ensure the Battery Maintenance Mode is inactive before disconnecting the low voltage 12 volt battery (or batteries). 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(s) will energize the 12 volt battery cables and charge the 12 volt battery (or batteries). Disconnecting any battery cables while this mode is active may result in an electrical shock or a burn from hot battery cable leads.

  1. 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
  2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  3. Raise and support the vehicle. Lifting and Jacking the Vehicle (Standard Service) , or Lifting and Jacking the Vehicle (Mobile Service)
  4. Remove the right rear tire and wheel assembly. Tire and Wheel Removal and Installation
  5. GM5810320Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Rear Tire Front Air Deflector Bolt- Right Side (1) - Remove [3x]

  6. Rear Tire Front Air Deflector- Right Side (2) - Remove
  7. GM5810333Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Rear Wheelhouse Liner Retainer- Right Side (2) - Remove

  8. Rear Wheelhouse Liner Bolt- Right Side (1) - Remove [3x]
  9. Rear Wheelhouse Liner- Right Side (3) - Position aside
  10. GM5831442Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) @ Trailer Brake Control Module - Disconnect

  11. GM5831440Courtesy of GENERAL MOTORS COMPANY

    Trailer Brake Power Control Module Nut (2) - Remove [2x]

  12. Trailer Brake Control Module (1) - Remove