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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 Heater Pipe Replacement - Rear >> Removal Procedure

Removal Procedure

  1. Drain the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac-N-Fill) .
    2. Fig 1: Identifying Auxiliary Heater Tubes Connector Nuts
    GM1968229Courtesy of GENERAL MOTORS CORP.
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Remove the right assist step if necessary. Refer to Assist Step Replacement (w/WS2, BVX) or Assist Step Replacement (Tubular BVE) .
  4. Remove the rear wheelhouse liner. Refer to Wheelhouse Panel Replacement .
  5. Remove the auxiliary heater tubes connector nuts (2) from the intermediate connection point.
    6. Fig 2: Auxiliary Heater Tubes
    GM1968254Courtesy of GENERAL MOTORS CORP.
  6. Pinch the tabs together at auxiliary HVAC module fittings to remove the auxiliary heater tubes (1).
    7. Fig 3: Identifying Heater Tubes Retaining Push Pins, Retaining Bolt, And Auxiliary Heater Tubes
    GM1968226Courtesy of GENERAL MOTORS CORP.
  7. Remove the heater tubes retaining push pins (1) at the frame locations.
  8. Remove the heater tubes retaining bolt (2) at the frame location.
  9. Remove the auxiliary heater tubes (3) from the frame.
  10. Remove the auxiliary heater tubes from the vehicle.
    11. Fig 4: Identifying Auxiliary Heater Tubes Clip
    GM1968221Courtesy of GENERAL MOTORS CORP.
  11. Remove auxiliary heater tubes clip retaining push pin/bolt (1) if necessary.
  12. Use a flat-bladed release tool to open retaining clips (2).
  13. Remove auxiliary heater tubes from vehicle.
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