Hummer H2. Manual - part 1987

Fig. 57: 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 pipe.  

2. Close the tool around the heater core pipe.  

3. Firmly pull the tool into the quick connect end of the heater hose.  

4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the inlet hose from 

the heater core.  

3. Using the J 43181 disconnect the surge tank outlet hose from the heater core. 

1. Install the J 43181 to the heater core pipe.  

2. Close the tool around the heater core pipe.  

3. Firmly pull the tool into the quick connect end of the heater hose.  

4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the surge tank 

outlet hose from the heater core. 

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

4. Remove the accumulator. Refer to Accumulator Replacement .  

5. Remove the instrument panel carrier. Refer to Instrument Panel (I/P) Carrier Replacement in 

Instrument Panel, Gauges and Console.  

6. Remove the HVAC module drain hose.  

7. Disconnect the electrical harnesses and the ground connections from the HVAC module assembly. 

Fig. 58: HVAC Module Assembly 
Courtesy of GENERAL MOTORS CORP. 

8. Remove the nuts (4) from the HVAC module assembly (2).  

9. Remove the bolts (3) from the HVAC module assembly (2). 

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

10. Remove the HVAC module assembly (2) from the vehicle (1).  

Installation Procedure 

Fig. 59: HVAC Module Assembly 
Courtesy of GENERAL MOTORS CORP. 

1. If replacing the HVAC module, transfer the components from the old HVAC module as necessary.  

2. Install the HVAC module assembly (2) to the vehicle (1). 

NOTE:

Refer to Fastener Notice in Cautions and Notices.

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

3. Install the nuts (4) to the HVAC module assembly (2). 

Tighten: Tighten the nuts to 9 N.m (80 lb in). 

4. Install the bolts (4) to the HVAC module assembly (2). 

Tighten: Tighten the bolts to 4 N.m (35 lb in). 

5. Connect the electrical harnesses and the ground connections.  

6. Install the HVAC module drain hose.  

7. Install the instrument panel carrier. Refer to Instrument Panel (I/P) Carrier Replacement in Instrument 

Panel, Gauges and Console.  

8. Install the accumulator. Refer to Accumulator Replacement . 

Fig. 60: Identifying Heater Hose To Heater Core Outlet 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2