Hummer H2. Manual - part 1980

2. Measure 50 mm (2 in) from the bend on the evaporator tube (4) near the expansion tube end and mark the 

location.  

3. Measure 50.8 mm (2 in) from the mark on the evaporator tube (4) from the previous step. 

4. Using a tubing cutter, cut the marked section of the evaporator tube (4).  

5. Remove the burrs from the evaporator tube (4). 

Fig. 33: A/C Refrigerant Filter Components 
Courtesy of GENERAL MOTORS CORP. 

6. Remove the nuts (4), the ferrules (3), and the O-rings (2) from the A/C refrigerant filter (1). 

IMPORTANT: Do not allow metal burrs to enter the evaporator tube (4) during cutting or 

when removing the burrs.

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

7. Push the nuts (4) and ferrules (3) over each of the evaporator tube halves.  

8. Install the ferrules (3) with the small end toward the nut (4). 

Fig. 34: A/C Refrigerant Filter & Evaporator Tube 
Courtesy of GENERAL MOTORS CORP. 

9. Install the A/C refrigerant filter (5) to the evaporator tube (4) with the flow arrow pointing towards the 

evaporator. 

IMPORTANT: DO NOT install the O-rings (2) in this step.

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

Fig. 35: A/C Refrigerant Filter Components 
Courtesy of GENERAL MOTORS CORP. 

10. While holding the evaporator tube in the A/C refrigerant filter (1), tighten the nuts (4) to the A/C 

refrigerant filter (1). 

Tighten: Tighten the nuts to 15 N.m (11 lb ft). 

11. Remove the nuts (4) from the A/C refrigerant filter (1).  

12. Coat the O-rings (2) with 525 viscosity refrigerant oil.  

13. Install the O-rings (2) to the evaporator tube halves.  

14. Install the nuts (4) to the A/C refrigerant filter (1). 

NOTE:

Refer to Fastener Notice in Cautions and Notices.

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

Tighten: Tighten the nuts to 15 N.m (11 lb ft).

15. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .  

16. Leak test the fittings of the component using the J 39400-A . See Special Tools and Equipment .  

17. Install the air cleaner. Refer to Air Cleaner Assembly Replacement in Engine Controls - 6.0 L.  

AIR CONDITIONING (A/C) REFRIGERANT FILTER REPLACEMENT 

Tools Required 

J 39400-A Halogen Leak Detector. See Special Tools and Equipment . 

Removal Procedure 

1. Recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging .  

2. Remove the air cleaner. Refer to Air Cleaner Assembly Replacement in Engine Controls - 6.0 L. 

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2