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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 309 (Heating, Ventilation, And Air Conditioning) >> Repair Instructions >> Auxiliary HVAC Module Removal and Installation (Extended Wheelbase) >> Removal Procedure

Removal Procedure

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  1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging (Non-HP2) , Refrigerant Recovery and Recharging (HP2) .
  2. Drain the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) .
  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
    4. Fig 1: Heater Lines, Air Conditioning Lines And Components
    GM1681365Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the heater lines (2, 3) from the auxiliary HVAC module at the underside of the vehicle.
  5. Disconnect the air conditioning lines (4, 5) from the auxiliary HVAC module at the underside of the vehicle.
  6. Remove the nuts (6) from the studs (1) that secure the auxiliary HVAC module to the underside of the vehicle.
  7. Lower the vehicle.
  8. Remove the right rear quarter trim panel. Refer to Rear Quarter Trim Panel Replacement - Right Side (Extended Wheelbase) , Rear Quarter Trim Panel Replacement - Right Side (Standard Wheelbase) .
  9. Disconnect the electrical connectors from the auxiliary HVAC module.
    10. Fig 2: Auxiliary HVAC Module Assembly And Fasteners
    GM1846828Courtesy of GENERAL MOTORS CORP.
  10. Remove the forward auxiliary air duct from HVAC module.
  11. Remove the fasteners (1) retaining the auxiliary HVAC module to the vehicle.
  12. Remove the auxiliary HVAC module (2) from the vehicle.
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