Hummer H2. Manual - part 1991

Fig. 72: Identifying Heater Hose To Heater Core Outlet 
Courtesy of GENERAL MOTORS CORP. 

5. Connect the heater inlet hose to the heater core.  

6. Pull the heater inlet hose to ensure the connection.  

7. Fill the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.  

HEATER HOSE REPLACEMENT - OUTLET 

Tools Required 

J 43181 Quick Connect Connector Removal Tool

IMPORTANT: Firmly push the quick connect onto the heater core pipe until you hear an 

audible click.

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

Removal Procedure 

1. Drain the cooling system. Refer to Draining and Filling Cooling System . 

Fig. 73: Identifying Heater Hose To Heater Core Outlet 
Courtesy 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. 

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

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.  

Fig. 74: Heater Inlet Hose & Mounting Clip 
Courtesy of GENERAL MOTORS CORP. 

4. Remove the surge tank outlet hose (3) from the mounting clip (2). 

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

Fig. 75: Heater Inlet Hose & Engine 
Courtesy 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). 

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2