Hummer H2. Manual - part 2257

5. Lower the vehicle. 

Fig. 66: Transmission Fluid Cooler Hoses & Radiator 
Courtesy of GENERAL MOTORS CORP. 

6. Install the transmission fluid cooler hoses to the radiator. Refer to Transmission Fluid Cooler Line 

Quick Connect Fitting .  

7. Install the transmission fluid cooler hose to the auxiliary transmission fluid cooler. Refer to 

Transmission Fluid Cooler Line Quick Connect Fitting . 

 

2004 Hummer H2 

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

  

Fig. 67: Auxiliary Oil Cooler 
Courtesy of GENERAL MOTORS CORP. 

8. Install the auxiliary oil cooler to the vehicle.  

9. Install the bolts to the transmission fluid auxiliary cooler. 

Tighten: Tighten the bolts to 17 N.m (12 lb ft).

 

2004 Hummer H2 

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

  

Fig. 68: Air Cleaner Resonator Outlet Duct 
Courtesy of GENERAL MOTORS CORP. 

10. Install the transmission fluid cooler hoses to the transmission fluid Auxiliary cooler. Refer to 

Transmission Fluid Cooler Line Quick Connect Fitting .  

11. Install the air cleaner resonator outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement 

in Engine Controls - 6.0L.  

TRANSMISSION FLUID COOLER LINE QUICK CONNECT FITTING 

Removal Procedure 

 

2004 Hummer H2 

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

  

Fig. 69: Removing Retaining Ring 
Courtesy of GENERAL MOTORS CORP. 

1. Pull the plastic cap back from the quick connect fitting and down along the cooler line about 5 cm (2 in).  

2. Using a bent-tip screwdriver, pull on one of the open ends of the retaining ring in order to rotate the 

retaining ring around the quick connect fitting until the retaining ring is out of position and can be 
completely removed.  

IMPORTANT: Perform the following procedure when removing the retaining rings and 

cooler lines from the quick connect fittings located on the radiator and/or 
the transmission.

 

2004 Hummer H2 

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2