Removal Procedure

Fig 1: Identifying Bolts And Communication Interface Module Cover

Courtesy of GENERAL MOTORS CORP.

NOTE: 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® 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.

WARNING: Refer to Battery Disconnect Warning .

Disconnect the battery ground cable.
Disconnect the electrical connectors from the communication interface module which is located on the bottom of the driver seat.
Slide the driver seat forward.
Remove the bolts (1) and remove the communication interface module cover (2) from the seat rear side.