The vehicle has a vehicle stability enhancement system called StabiliTrak. It is an advanced computer controlled system that assists the driver with directional control of the vehicle in difficult driving conditions.
StabiliTrak activates when the computer senses a discrepancy between the intended path and the direction the vehicle is actually traveling. StabiliTrak selectively applies braking pressure at any one of the vehicle's brakes to assist the driver with keeping the vehicle on the intended path.
When the vehicle is started and begins to move, the system performs several diagnostic checks to insure there are no problems. The system may be heard or felt while it is working. This is normal and does not mean there is a problem with the vehicle.
If cruise control is being used when StabiliTrak activates, the cruise control automatically disengages. The cruise control can be re-engaged when road conditions allow. See Cruise Control.
If there is a problem detected with StabiliTrak, a SERVICE STAB SYS message displays on the Driver Information Center (DIC). See DIC Warnings and Messages for more information. When this message is displayed, the system is not working. Adjust your driving accordingly.
StabiliTrak comes on automatically whenever the vehicle is started and resets itself at each ignition cycle. However, when the transfer case is placed in Four-Wheel-Low Lock mode, StabiliTrak is automatically disabled. See Full-Time Four-Wheel Drive for more information. It is recommended to leave the system on for normal driving conditions, but it may be necessary to turn the system off if the vehicle is stuck in sand, mud, ice, or snow, and it is necessary to "rock" the vehicle to attempt to free it. See If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow.
To turn the system off, press and hold the TCS/StabiliTrak button until the traction off light comes on.
This light comes on steady when TCS has been turned off. This light flashes when StabiliTrak is active.
To Turn off TCS and StabiliTrak, press and hold the TCS/StabiliTrak button until the STAB SYS OFF message displays on the DIC. Press and release the TCS/StabiliTrak button again to turn StabiliTrak back on. See "Traction Control System (TCS)", following, for more information on turning TCS off and on.