Hummer H2. Manual - part 728

Fig. 42: Identifying Rear Lift Window 
Courtesy of GENERAL MOTORS CORP. 

4. With the aid of an assistant, remove the window from the opening.  

Installation Procedure 

1. Install the stationary window into the opening. Refer to Urethane Adhesive Installation of Stationary 

Windows . 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Stationary Windows - Hummer H2

  

Fig. 43: Identifying Rear Lift Window 
Courtesy of GENERAL MOTORS CORP. 

2. Connect the electrical connector to the window defogger on the window, if equipped. 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Stationary Windows - Hummer H2

  

Fig. 44: Electrical Connector & Window Defogger 
Courtesy of GENERAL MOTORS CORP. 

3. Install the window garnish molding to the door frame.  

4. Remove the double layer of masking tape around the perimeter of the painted surfaces and the interior 

trim.  

DESCRIPTION AND OPERATION 

ADHESIVE SERVICE KIT DESCRIPTION 

The GM Adhesive Caulking Kit P/N 12346392 contains the following items: 

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4 different primers  

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A tube of urethane adhesive with a nozzle  

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4 daubers  

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Instructions with warnings  

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Stationary Windows - Hummer H2

  

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Use the urethane adhesive caulking kit for replacement of any urethane adhesive-installed window using 
the Full Cut Method. 

You may use an equivalent urethane adhesive system if the system meets GM Specification GM 3651M. 
Always follow the system manufacturer's instructions for application, handling, and curing. 

AUTOMATIC DAY-NIGHT MIRROR DESCRIPTION AND OPERATION 

Inside Rearview Mirror with the Automatic Day-Night Feature System Components 

The inside rearview mirror with the automatic day-night feature system consists of the following components: 

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Inside rearview mirror  

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Ambient air temperature sensor  

Power and Ground of the Inside Rearview Mirror 

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With the ignition ON, ignition voltage is supplied to the mirror from the IGN E fuse in the underhood 
fuse block.  

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Ground for the mirror is provided by G302.  

Inside Rearview Mirror with the Automatic Day-Night Feature System Operation 

The inside rearview mirror uses 2 photocell sensors. One sensor is the headlight sensor, located on the face side 
of the mirror. The headlight sensor is used to determine light conditions present at the mirror face. The other 
sensor is the ambient light sensor, located on the rear of the mirror or windshield side. The ambient light sensor 
is used to determine the exterior light conditions. With a low exterior light condition detected, and a high light 
condition from behind of the car, at the headlight sensor, the inside rearview mirror will automatically darken 
the face of the mirror. 

In the daytime, the mirror is in a normal state because of the high exterior light condition that is indicated by the 
ambient light sensor. With the gear selector lever in the REVERSE position, backup lamp supply voltage is 
supplied as an input to the inside rearview mirror. The mirror monitors this input to disable the automatic day-
night feature. This allows the driver to see objects in the mirror clearly when backing up, even during the night. 

Compass 

The mirror uses 2 magnetic field sensors for compass direction. One sensor is for north and south, the other is 
for east and west. The mirror supplies a signal and low reference to each sensor. As the vehicle travels with or 
against the earths magnetic pull, there will be a change in voltage on one or both sensors. As a result of the 
change in voltage, the mirror changes the heading on the compass display. 

Temperature Display 

The inside rearview mirror monitors the ambient air temperature sensor. As the outside air temperature gets 
warmer, the ambient air temperature sensor will lower resistance. The inside rearview mirror monitors this 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Stationary Windows - Hummer H2