2008 Cadillac STS Owner's Manual - Page 287

If there is a problem detected with StabiliTrak®, a SERVICE STABILITY SYS message will be displayed on the DIC. See DIC Warnings and Messages on page 3-80. When this message is displayed, the system is not operational. Driving should be adjusted accordingly. StabiliTrak® comes on automatically whenever the vehicle is started. To help assist with directional control of the vehicle, always leave the system on. StabiliTrak® can be turned off, however, by using the TC (traction control) on/off button. See Traction Control System (TCS) on page 4-6. If the vehicle is in cruise control when the StabiliTrak® activates, the cruise control will automatically disengage. When road conditions allow you to safely use it again, you may reengage the cruise control. See Cruise Control on page 3-17 or Adaptive Cruise Control on page 3-20 for more information. During extreme cold temperature conditions, the active steering function may be temporarily disabled which may cause the steering wheel to be off set from the center position while driving straight. This is normal operation and the vehicle is safe to drive in these cases. Stability control activates when the computer senses a difference between the intended path and the direction the vehicle is actually traveling. Stability control automatically adjusts the front road wheel steering angle, modifies the suspension stiffness, and selectively applies braking pressure at any one of the vehicle's brakes to help maintain directional control of the vehicle. When the system activates, a STABILITY SYS ACTIVE message displays on the Driver Information Center (DIC). See DIC Warnings and Messages on page 3-80 You may also hear a noise or feel vibration in the brake pedal. This is normal. Continue to steer the vehicle in the direction you want it to go. Enhanced StabiliTrak® All-wheel-drive (AWD) vehicles with the Active Steering with Enhanced StabiliTrak® option have an enhanced computer controlled vehicle stability system that assists with directional control of the vehicle in difficult driving conditions. This system coordinates automatic control of the Active Steering System, the Magnetic Ride Control Suspension System, and the Brake Control System for better vehicle performance. 4-9