Removal Procedure
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:
This vehicle may be equipped with line of two versions of the OnStar® System. Early production vehicles will have the generation 4 module. Later productions will have the generation 5 module. The two modules can not be interchanged. The generation 4 module can be identified by the use of three connector cavities. The generation 5 module uses four connector cavities.
- Remove the rear compartment trim. Refer to BODY REAR END in Body Rear End.
- Remove the electrical component mounting bracket nuts (2).
NOTE: DO NOT completely remove the electrical component mounting bracket until the GPS antenna cable is removed from the cross car brace. Failure to do so may result in damage to the GPS connector.
- Carefully pull the electrical component mounting bracket (1) away from the body, so that the cross car brace is visible.
- Remove the GPS antenna cable (1) from the cross car brace.
- Place the electrical component mounting bracket (2) module side up in the rear compartment.
- Release the vehicle communication interface module (VCIM) (3) retaining tab (2).
- Slide the vehicle VCIM (3) out of the electrical component mounting bracket (1).
- Disconnect the antenna and electrical connections from the VCIM (3).