The StabiliTrak and Traction Control System (TCS) indicator/warning light comes on briefly while starting the engine.
If it does not, have the vehicle serviced by your dealer/retailer. If the system is working normally the indicator light then goes off.
The light flashes while the StabiliTrak system and TCS are working to assist the driver with directional control of the vehicle in difficult driving conditions.
If the StabiliTrak system and TCS light comes on and stays on while driving and a TRACTION FAULT or SERVICE STAB SYS message displays on the DIC, the vehicle needs service.
The light also comes on steady when the StabiliTrak system and/or TCS are turned off. The DIC also displays a TRAC OFF and/or STAB SYS OFF message. If the TCS is off, wheel spin is not limited. If the StabiliTrak system is off, the system does not assist the driver with directional control of the vehicle. The light turns off when the TCS and StabiliTrak system are turned back on.
See StabiliTrak® System , Traction Control System (TCS) and DIC Warnings and Messages for more information.