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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 - Front >> 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. Remove the air cleaner resonator outlet duct replacement Air Cleaner Resonator Outlet Duct Replacement .
    3. Fig 1: Squeezing Quick Connect Fitting Release Tabs (Plastic Collar)
    GM12777Courtesy of GENERAL MOTORS CORP.
  3. Squeeze the plastic retainer release tabs.
    4. Fig 2: Hose Connection Components
    GM1970350Courtesy of GENERAL MOTORS CORP.
  4. Pull the hose connection apart.
    5. Fig 3: Identifying Auxiliary Heater Tubes Connector Nuts
    GM1968229Courtesy of GENERAL MOTORS CORP.
  5. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  6. Remove the right assist step if necessary. Refer to Assist Step Replacement (w/WS2, BVX) or Assist Step Replacement (Tubular BVE) .
  7. Remove the front wheelhouse liner if necessary. Refer to Wheelhouse Panel Replacement .
  8. Remove the auxiliary heater tubes connector nuts (2) from the intermediate connection point.
    9. Fig 4: Auxiliary Heater Tubes Clip Push Pins Locations
    GM1968232Courtesy of GENERAL MOTORS CORP.
  9. Remove the auxiliary heater tubes clip push pins (1) from vehicle frame locations.
  10. Remove the auxiliary heater tubes (2) from vehicle.
    11. Fig 5: 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 blade release tool to open retaining clips (2).
  13. Remove auxiliary heater tubes (3) from retaining clips.
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