2007 Cadillac STS Owner's Manual - Page 249

Anti-Lock Brake System Warning Light With the Anti-Lock Brake System (ABS), this light will come on when your engine is started and may stay on for several seconds. That is normal. If the ABS warning light comes on and stays on, there may be a problem with the antilock portion of the brake system. If the brake system warning light is not on, you still have brakes, but you do not have antilock brakes. See Brake System Warning Light on page 248 for more information. If the light stays on, press the ignition Acc. button. If the light comes on when you are driving, stop as soon as possible and turn the ignition off. Then start the engine again to reset the system. If the light still stays on, or comes on again while you are driving, your vehicle needs service. If the regular brake system warning light is not on, you still have brakes, but you do not have anti-lock brakes. If the regular brake system warning light is also on, you do not have anti-lock brakes and there is a problem with your regular brakes. See Brake System Warning Light on page 248 for more information. The ABS warning light should come on briefly when you turn the ignition on. If the light does not come on then, have it fixed so it will be ready to warn you if there is a problem. Low Tire Pressure Warning Light This light will come on briefly as you start the engine, for vehicles equipped with the Tire Pressure Monitor System. This light will also come on when one or more of your tires are significantly underinflated. 249