Service Theft System
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The PCM will send a message to the driver information center (DIC) to display Service Theft System when the PCM has lost communication with the BCM after the vehicle has been started. The BCM will send a message to the driver information center (DIC) to display Service Theft System when the BCM is unable to read the key transponder value after the vehicle has started.