2009 Cadillac CTS Owner's Manual - Page 184

Brake System Warning Light This vehicle's hydraulic brake system is divided into two parts. If one part is not working, the other part can still work and stop the vehicle. For good braking both parts need to be working well. If the warning light comes on, there is a brake problem. Have the brake system inspected right away. If the light stays on after the parking brake is fully released there is a base brake problem. For vehicles with the Electric Park Brake (EPB), if the light continues flashing after the brake is released, or while driving, there is a problem with the Electric Parking Brake system. If the light comes on while driving, pull off the road and stop carefully. The pedal may be harder to push, or the pedal may go closer to the floor. The vehicle may take longer to stop. If the light is still on, have the vehicle towed for service. See Towing Your Vehicle on page 4-26. { CAUTION: United States Canada The brake system might not be working properly if the brake system warning light is on. Driving with the brake system warning light on can lead to a crash. If the light is still on after the vehicle has been pulled off the road and carefully stopped, have the vehicle towed for service. This light should come on briefly when the ignition is turned to ON/RUN. If it does not come on then, have it fixed so it will be ready to warn if there is a problem. When the ignition is on, the brake system warning light will also come on when the parking brake is set. The light will flash or stay on if the parking brake is not fully released. 3-38