2006 Pontiac Vibe Owner's Manual - Page 201

This system will activate when your vehicle speed reaches or exceeds 9 mph (15 km/h), and will deactivate when the vehicle speed reduces to below 9 mph (15 km/h). You may hear a sound in the engine compartment for a few seconds when the engine is started or just after the vehicle begins to move. This means that the system is in the self-check mode, but does not indicate a malfunction. If the vehicle is going to skid during driving, the traction control system warning light will blink and an alarm will sound intermittently. Adjust your driving accordingly. This light warns that there is a problem somewhere in the traction control system or StabiliTrak®. Panic Brake Assist Your vehicle has a panic brake assist system that monitors the intention of the driver while braking. If the system senses that the driver has applied hard/fast pressure to the brake pedal, the system will generate additional pressure, making it easier for the driver to maintain brake application. 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 may feel the brakes vibrate, or you may notice some noise but this is normal. The brakes will return to normal operation after the brake pedal has been released. The brake assist system becomes operational after the vehicle has accelerated to a speed in excess of approximately 6 mph (10 km/h). It stops operating when the vehicle decelerates to a speed below approximately 3 mph (5 km/h). 4-11