Hummer H2. Manual - part 1407

Fig. 85: Air Cleaner Outlet Duct 
Courtesy of GENERAL MOTORS CORP. 

14. Install the air cleaner outlet duct.  

IMPORTANT: Align the arrow at the throttle body end of the duct with the throttle body 

attaching stud.

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2

  

15. Install the radiator inlet hose clip to the outlet duct.  

16. Tighten the air cleaner outlet duct clamps at the following locations: 

z

Throttle body  

z

MAF/IAT sensor 

Tighten: Tighten the air cleaner outlet duct clamp screws to 7 N.m (62 lb in). 

17. Fill the cooling system. Refer to Draining and Filling Cooling System .  

DRAIN COCK REPLACEMENT 

Removal Procedure 

Fig. 86: Radiator Drain Cock 
Courtesy of GENERAL MOTORS CORP. 

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

2. Remove the radiator drain cock.  

Installation Procedure 

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2

  

Fig. 87: Radiator Drain Cock 
Courtesy of GENERAL MOTORS CORP. 

1. Install the radiator drain cock.  

2. Fill the cooling system. Refer to Draining and Filling Cooling System .  

FAN SHROUD REPLACEMENT 

Removal Procedure 

1. Loosen the air cleaner outlet duct clamps from the throttle body.  

2. Loosen the air cleaner outlet duct clamps from the mass airflow sensor.  

3. Remove the air cleaner outlet duct. 

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2

  

Fig. 88: Radiator Hose & Radiator (Inlet) 
Courtesy of GENERAL MOTORS CORP. 

4. Remove the radiator inlet hose from the fan shroud retainer (3).  

5. Remove the bolt (5) from the fan shroud (3).  

6. Remove the transmission oil cooler line from the fan shroud retainer.  

7. Rotate the slip ring from under the fan shroud. 

 

2004 Hummer H2 

2004 ENGINE Engine Cooling - Hummer H2