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| Communication Interface Module
Procedure
- Pull down to release the module from the bracket.
- Disconnect the electrical connectors, the GPS antenna, and the cellular coax cable.
- If replacing the module, record the 10-digit STID number, and the 11-digit ESN number from the labels on the new module.
- Reconfigure the OnStar® system. Refer to
Control Module References.
- When replacing the communication interface module be sure to transfer the Bluetooth antenna, if equipped.
Tip 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. |