Traction Control System Indicator

WARNING: This page is about a different car, the 2011 GMC Cab & Chassis Sierra, 2011 Chevrolet Suburban, and 2011 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

TRAC OFF

The instrument cluster illuminates the TRAC OFF indicator when the following occurs:

The EBCM inhibits the traction control system due to a malfunction in the traction control system. The instrument cluster receives a serial data message requesting the TRAC OFF lamp to illuminate.
The BCM detects that the traction control switch has been pressed (signal circuit is low). The BCM sends a serial data message to the EBCM in order to disable traction control. The instrument cluster receives a serial data message requesting the TRAC OFF lamp to illuminate. The BCM sends a serial data message to the radio in order to activate an audible warning.