2010 Cadillac STS Owner's Manual - Page 324

Braking in Emergencies ABS allows the driver to steer and brake at the same time. In many emergencies, steering can help more than even the very best braking. StabiliTrak® System The vehicle has a vehicle stability enhancement system called StabiliTrak. It is an advanced computer controlled system that assists with directional control of the vehicle in difficult driving conditions. If the vehicle has all‐wheel‐drive and has Active Steering with Enhanced StabiliTrak, see Enhanced StabiliTrak® on page 5‑7. 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 help steer the vehicle in the intended direction. When the system activates, a STABILITY SYS ACTIVE message will be displayed on the Driver Information Center (DIC). See DIC Warnings and Messages on page 4‑76. A noise may be heard or a vibration felt in the brake pedal. This is normal. Continue to steer the vehicle in the intended direction. 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 4‑76. When this message is displayed, the system is not operational. Driving should be adjusted accordingly. Brake Assist This vehicle has a Brake Assist feature designed to assist the driver in stopping or decreasing vehicle speed in emergency driving conditions. This feature uses the stability system hydraulic brake control module to supplement the power brake system under conditions where the driver has quickly and forcefully applied the brake pedal in an attempt to quickly stop or slow down the vehicle. The stability system hydraulic brake control module increases brake pressure at each corner of the vehicle until the ABS activates. Minor brake pedal pulsations or pedal movement during this time is normal and the driver should continue to apply the brake pedal as the driving situation dictates The Brake Assist feature will automatically disengage when the brake pedal is released or brake pedal pressure is quickly decreased. 5-6