Global Positioning System Module: Service and Repair

COMMUNICATION INTERFACE MODULE REPLACEMENT

REMOVAL PROCEDURE




1. Remove the windshield garnish molding.

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.

2. Remove the upper trim pad.
3. Remove the bolt holding the locking strap which secures the VCIM to the bracket.
4. Disconnect the electrical connectors.
5. Disconnect the cell antenna coaxial cable from the VCIM.
6. Remove the VCIM from the bracket and from the vehicle.

IMPORTANT: Return the old VCIM for core credit.

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.




2. Install the VCM to the bracket using the clip strap and tighten the bolt.

Tighten the bolt to 10 N.m (89 lb in).

NOTE: Refer to Fastener Notice in Service Precautions.

3. Connect the electrical connectors.

Tighten the module thumb screw to a maximum of 0.2 N.m (2 lb in).

NOTE: In order to avoid damage to the circuit board, do NOT over-tighten the thumb screws. Using your fingers, apply only a light pressure.

4. Connect the cell antenna coaxial cable to the VCIM.
5. Install the upper trim pad.
6. Install the windshield garnish molding.
7. Reconfigure the OnStar(R) system. Refer to Control Module References in Computer/Integrating Systems. Programming and Relearning

IMPORTANT: After replacing the vehicle communication interface module, you must configure the OnStar(R) system. Failure to configure 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.