Hummer H2. Manual — part 221

1. Remove the I/P center trim panel. Refer to Trim Panel Replacement - Instrument Panel (I/P) Center

in Instrument Panel, Gages, and Console.

IMPORTANT: The vehicle communication interface module (VCIM) has a specific set of

unique numbers that tie the module to each vehicle. These numbers, the
10-digit station identification and the 11-digit electronic serial number, are
used by the National Cellular Network and OnStar(R) to identify the
specific vehicle. Because these numbers are tied to the vehicle
identification number of the vehicle, you must never exchange these parts
with those of another vehicle.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

Fig. 14: Communication Interface Module & I/P
Courtesy of GENERAL MOTORS CORP.

2. Remove the screws that hold the communication interface module to the I/P.

Fig. 15: Communication Interface Module
Courtesy of GENERAL MOTORS CORP.

3. Disconnect the antenna and the electrical connections from the communication interface module.

4. Remove the communication interface module.

Installation Procedure

1. When replacing a VCIM, record the 11-digit electronic serial number (ESN) and the 10-digit station

identification (STID) number from the label on the new VCIM.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

Fig. 16: Communication Interface Module
Courtesy of GENERAL MOTORS CORP.

2. Connect the electrical and the antenna connections to the communication interface module.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

Fig. 17: Communication Interface Module & I/P
Courtesy of GENERAL MOTORS CORP.

3. Install the communication interface module screws.

Tighten: Tighten the screws to 2 N.m (18 lb in).

4. Install the I/P center trim panel. Refer to Trim Panel Replacement - Instrument Panel (I/P) Center in

Instrument Panel, Gages, and Console.

IMPORTANT: After replacing the vehicle communication interface module, you must

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2