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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 >> Heater Outlet Hose Replacement >> Removal Procedure

Removal Procedure

  1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac-N-Fill) .
    2. Fig 1: Identifying Heater Hose To Heater Core Fittings
    GM362171Courtesy of GENERAL MOTORS CORP.
  2. Using the J 43181  disconnect the inlet heater hose from the heater core.
    1. Install the J 43181  to the heater core inlet pipe.
    2. Close the tool around the heater core inlet pipe.
    3. Firmly pull the tool into the quick connect end of the heater inlet hose.
    4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the hose from the heater core.
  3. Using the J 43181  disconnect the surge tank outlet hose from the heater core outlet.
    1. Install the J 43181  to the heater core outlet pipe.
    2. Close the tool around the heater core outlet pipe.
    3. Firmly pull the tool into the quick connect end of the heater outlet hose.
    4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the hose from the heater core.
    4. Fig 2: Heater Hose & Mounting Clip
    GM814572Courtesy of GENERAL MOTORS CORP.
  4. Remove the surge tank outlet hose (3) from the mounting clip (2).
    5. Fig 3: Surge Tank Hose & Engine (Outlet)
    GM814578Courtesy of GENERAL MOTORS CORP.
  5. Reposition the surge tank outlet hose clamp (3) from the engine (2).
  6. Remove the surge tank outlet hose (6) from the engine (2).
    7. Fig 4: Surge Tank Components
    GM801110Courtesy of GENERAL MOTORS CORP.
  7. Reposition the surge tank outlet hose clamp (5) from the surge tank (2).
  8. Remove the surge tank outlet hose (3) from the surge tank (2).
  9. Remove the surge tank outlet hose (3) from the vehicle.
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