Hummer H2. Manual - part 222

5. Reconfigure the OnStar(R) system. Refer to OnStar Reconfiguration .  

ONSTAR(R) MICROPHONE REPLACEMENT 

Removal Procedure 

Fig. 18: OnStar(R) Microphone Bezel & Headliner 
Courtesy of GENERAL MOTORS CORP. 

1. Twist and remove the OnStar microphone bezel from the headliner. 

reconfigure the OnStar(R) system. Failure to reconfigure the system will 
result in an additional customer visit for repair. In addition, pressing and 
holding the white dot button on the keypad will NOT reset this version of 
the OnStar(R) system. This action will cause a DTC to set.

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

Fig. 19: Microphone Connector & Jumper Harness 
Courtesy of GENERAL MOTORS CORP. 

2. Disconnect the microphone connector from the jumper harness.  

Installation Process 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

Fig. 20: Microphone Connector & Jumper Harness 
Courtesy of GENERAL MOTORS CORP. 

1. Connect the electrical connection to the OnStar microphone. 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

  

Fig. 21: OnStar(R) Microphone Bezel & Headliner 
Courtesy of GENERAL MOTORS CORP. 

2. Mount the OnStar(R) microphone and bezel to the headliner.  

3. Check OnStar(R) microphone for proper operation.  

DESCRIPTION AND OPERATION 

ONSTAR(R) DESCRIPTION AND OPERATION 

This vehicle uses either the Generation 5 or Generation 6 version of the OnStar(R) system. These systems 
consist of the following components: 

z

Vehicle communication interface module (VCIM)  

z

OnStar(R) button assembly  

z

Microphone  

z

Cellular antenna  

z

Navigation antenna  

This system also interfaces with the factory installed vehicle audio system.

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2