2003 Pontiac Grand Prix Owner's Manual - Page 150
2003 Pontiac Grand Prix Manual
Page 150 highlights
Anti-Lock Brake System Warning Light if your vehicle has the optional anti-lock brake system, this light will come on when your engine is started and may stay on for several seconds. That's normal. Traction Control System (TCS) Warning Light If your vehicle is equipped with the 3800 supercharged V6 engine, the traction control system warning light may come on for the following reasons: TCS OFF If the anti-lock brake system warning light stays on longer than normal after you've started your engine, turn the ignition off. If the light comes on and stays on while 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 light is on and the regular brake system warning light isn't on, you still have brakes, but you don't have anti-lock brakes. The anti-lock brake system warning light should come on briefly when you turn the ignition key to RUN. This is normal. If the light doesn't come on then, have it fixed so it will be ready to warn you if there is a problem. @ If you turn the system off by pressing the TCS button located on the far right side of the trip computer, the warning light will come on and stay on. To turn the system back on, press the button again. The warning light should go off. See Traction Control System (TCS) on page 4-10 for more information. If there's a brake system problem that is specifically related to traction control, the traction control system will turn off and the warning light will come on. If your brakes begin to overheat, the traction control system will turn off and the warning light will come on until your brakes cool down. If the traction control system warning light comes on and stays on for an extended period of time when the system is turned on, your vehicle needs service. 3-29