Hummer H2. Manual - part 1986

Automatic Transmission - 4L60-E.  

10. Install the power steering cooler. Refer to Power Steering Cooler Replacement in Power Steering 

System.  

11. Install the bolt and nut from the right hood spring. 

Tighten: Tighten the nut to 16 N.m (12 lb ft). 

12. Install the bolt and nut from the left hood spring. 

Tighten: Tighten the nut to 16 N.m (12 lb ft). 

13. Evacuate and recharge the system. Refer to Refrigerant Recovery and Recharging .  

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

ACCUMULATOR REPLACEMENT 

Tools Required 

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

Removal Procedure 

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

2. Disconnect the electrical connector from the A/C low pressure switch.  

3. Remove the compressor hose nut from the accumulator.  

4. Remove the compressor hose from the accumulator. 

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

Fig. 55: Retaining Bracket & Accumulator 
Courtesy of GENERAL MOTORS CORP. 

5. Remove the nut (2) from the evaporator fitting.  

6. Remove the accumulator bracket nut (4) from the retaining stud.  

7. Remove the accumulator (3).  

8. Remove the retaining bracket bolt (5).  

9. Remove the retaining bracket (6) from the accumulator (3).  

10. Remove and discard the O-ring seals.  

Installation Procedure 

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

Fig. 56: Retaining Bracket & Accumulator 
Courtesy of GENERAL MOTORS CORP. 

1. Add the proper amount of PAG oil to the accumulator. Refer to Refrigerant System Capacities .  

2. Install new O-ring seals. Refer to O-Ring Replacement .  

3. Install the retaining bracket (6) to the accumulator. 

4. Install the retaining bracket bolt (5). 

Tighten: Tighten the bolt to 10 N.m (89 lb in).

NOTE:

Refer to Fastener Notice in Cautions and Notices.

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

5. Install the accumulator (3).  

6. Install the accumulator bracket nut (4). 

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

7. Install the nut (2) to the evaporator fitting. 

Tighten: Tighten the nut to 16 N.m (12 lb ft). 

8. Install the compressor hose to the accumulator.  

9. Install the compressor hose nut to the accumulator. 

Tighten: Tighten the nut to 16 N.m (12 lb ft). 

10. Connect the electrical connector to the A/C low pressure switch.  

11. Evacuate and recharge the system. Refer to Refrigerant Recovery and Recharging .  

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

HVAC MODULE ASSEMBLY REPLACEMENT 

Tools Required 

J 43181 Quick Connect Connector Removal Tool 

Removal Procedure 

1. Drain the engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling. 

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2