Service Traction System Message
WARNING: This page is about a different car, the 2007 Buick LaCrosse and 2007 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The driver information center (DIC) displays the service traction system message when any one of many ABS-disabling DTCs is set. The electronic brake control module (EBCM) sends a serial data message to the DIC requesting this display.