Global Positioning System Module: Service and Repair

Telematics Control Module -J499-, Removing and Installing

NOTE:
- If the telematic control module is replaced, the OnStar (r) system needs to be reconfigured.







- DO NOT exchange Telematics Control Modules between vehicles. Each module contains specific Station Identification (STID) and Electronic Serial Number (ESN) data unique to the VIN. This data is used by OnStar (r) and National Cellular Telephone Network to identify the vehicle and administer the customer's account.
- Using the VAS 5051/5052 Vehicle Diagnostic Testing and Information system in operating mode "Guided Fault Finding, and function "-J499- Telematics control module, replacing" it is possible to read the telematic control module coding from the existing module before removal. Note code prior to removal in order input code into replacement control module.

Removing
- Disconnect battery
- Remove right rear side panel trim







- Remove speaker retaining bracket -1-.
- Disconnect electrical connector behind speaker -2-.







- Pull out protective shield -1- inserted under speaker
- Pull out lid -2- from protective shield







- First disconnect 42-pin connection -2- from control module, as follows:
- Depress clip and slide locking lever
- Then disconnect antenna cable connections -1- and -3- from control module.

Installing
Install in reverse order of removal, noting the following:
- Reconnect battery

If telematics control module was replaced:
- Code telematics control module.
- Reconfigure telematics system for OnStar (r) functions.