2005 Saturn Ion Owner's Manual - Page 139

If the brake system warning light comes on, there is a brake problem. Have your brake system inspected right away. When the ignition is on, the BRAKE light will come on when you set your parking brake. The light will stay on if your parking brake does not release fully. A chime will also sound if the parking brake is not fully released and the vehicle is moving. If it stays on after your parking brake is fully released, it means you have a brake problem. The BRAKE light will also come on to indicate a low brake fluid level. See Brakes on page 5-38 for more information. If the light comes on while you are driving, pull off the road and stop carefully. You may notice that the pedal is harder to push or the pedal may go closer to the floor. It may take longer to stop. If the light is still on, have the vehicle towed for service. See Towing Your Vehicle on page 4-34. {CAUTION: Your brake system may not be working properly if the brake system warning light is on. Driving with the brake system warning light on can lead to an accident. If the light is still on after you have pulled off the road and stopped carefully, have the vehicle towed for service. 3-31