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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating, Ventilation, And Air Conditioning >> Repair Instructions >> Auxiliary Air Conditioning Evaporator Rear Tube Replacement >> Removal Procedure

Removal Procedure

  1. Recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging .
  2. Drain the engine coolant if necessary. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac-N-Fill) .
    3. Fig 1: Identifying Auxiliary Heater Tubes Connector Nuts
    GM1968229Courtesy of GENERAL MOTORS CORP.
  3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  4. Remove the right assist step if necessary. Refer to Assist Step Replacement (w/WS2, BVX) or Assist Step Replacement (Tubular BVE) .
  5. Remove the rear wheelhouse liner. Refer to Wheelhouse Panel Replacement .
  6. Remove the auxiliary A/C evaporator tubes connector nuts (1) from the intermediate connection point.
  7. Remove the auxiliary heater tubes connector nuts (2) if necessary.
    8. Fig 2: Identifying Retaining Nut And Auxiliary A/C Evaporator Tubes
    GM1968248Courtesy of GENERAL MOTORS CORP.
  8. Remove the retaining nut (1) and the auxiliary A/C evaporator tubes (3) from the auxiliary HVAC module.
    9. Fig 3: Identifying Heater Tubes Retaining Push Pins, Retaining Bolt, And Auxiliary Heater Tubes
    GM1968226Courtesy of GENERAL MOTORS CORP.
  9. Remove the heater - A/C tubes retaining push pins (1) at the frame locations.
  10. Remove the heater - A/C tubes retaining bolt (2) at the frame location.
  11. Remove the auxiliary A/C evaporator tubes (3) from the frame.
  12. Remove the auxiliary A/C evaporator tubes from the vehicle.
    13. Fig 4: Identifying Auxiliary Heater Tubes Clip
    GM1968221Courtesy of GENERAL MOTORS CORP.
  13. Remove auxiliary heater - A/C tubes clip retaining push pin/bolt (1) if necessary.
  14. Use a flat-bladed release tool to open retaining clips (2).
  15. Remove auxiliary A/C tubes from vehicle.
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