2008 Pontiac Solstice Owner's Manual - Page 172

Brake Assist If your vehicle has ESC with ABS, it also has a brake assist feature that responds to emergency braking by generating additional pressure and engaging the ABS. When this happens, the brake pedal will feel easier to push. Just hold the brake pedal down firmly and let the system work for you. You might feel the brakes vibrate or notice some noise, but this is normal. The brakes will return to normal operation after the brake pedal is released. Brake assist cannot compensate for unsafe driving practices and braking effectiveness, itself, depends on the condition of the road, tires, and brakes and vehicle mass. Traction Control System (TCS) Your vehicle may have a Traction Control System (TCS) that limits wheel spin. This is especially useful in slippery road conditions. The system operates only if it senses that the rear wheels are spinning too much or are beginning to lose traction. When this happens, the system works the rear brakes and reduces engine power by closing the throttle and managing engine spark to limit wheel spin. If your vehicle has TCS, there is a ESC/TCS button located on the instrument panel. This light will flash when your traction control system is limiting wheel spin. You may feel or hear the system working, but this is normal. 4-6