2004 Pontiac Grand Prix Owner's Manual - Page 141

Anti-Lock Brake System Warning Light If your vehicle has the Anti-lock Brake System (ABS), this light will come on when your engine is started and may stay on for several seconds. That's normal. If the ABS warning light comes on and stays on, there may be a problem with the anti-lock portion of the brake system. If the brake system warning light is not on, you still have brakes, but you don't have anti-lock brakes. See Brake System Warning Light on page 3-36. If the light stays on, turn the ignition to OFF. If the light comes on when you're 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're driving, your vehicle needs service. If the regular brake system warning light isn't on, you still have brakes, but you don't have anti-lock brakes. If the brake system warning light is also on, you don't have anti-lock brakes and there's a problem with your regular brakes. See Brake System Warning Light on page 3-36. The anti-lock brake system warning light will come on briefly when you turn the ignition key to RUN. This is normal. If the light doesn't come then, have it fixed so it will be ready to warn you if there is a problem. 3-37