Communication Interface Module Replacement

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Communication Interface Module

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
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® 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. IMPORTANT: After replacing the vehicle communication interface module, you must reconfigure the OnStar® 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® system. This action will cause a DTC to set. IMPORTANT: When replacing the Communication Interface Module be sure to transfer Bluetooth Antenna, if equipped. Preliminary Procedure Remove the front rear compartment trim. Refer to Rear Compartment Front Trim Panel Replacement . Program the communication interface module (OnStar®) after replacement. Refer to Control Module References .
1	Navigation Receiver Nut (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 3.5 N.m (31 lb in)
2	Navigation Receiver Assembly

Callout

Component Name

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® 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.

IMPORTANT: After replacing the vehicle communication interface module, you must reconfigure the OnStar® 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® system. This action will cause a DTC to set.

IMPORTANT: When replacing the Communication Interface Module be sure to transfer Bluetooth Antenna, if equipped.

Preliminary Procedure

Remove the front rear compartment trim. Refer to Rear Compartment Front Trim Panel Replacement .
Program the communication interface module (OnStar®) after replacement. Refer to Control Module References .

Navigation Receiver Nut (Qty: 2)

CAUTION: Refer to Fastener Caution .

Tighten: 3.5 N.m (31 lb in)

Navigation Receiver Assembly