2003 Chevrolet Impala Owner's Manual - Page 223

To turn the system on or off, press the TRAC OFF button on the left side of the instrument panel. Steering Power Steering If you lose power steering assist because the engine stops or the system is not functioning, you can steer but it will take much more effort. Steering Tips Driving on Curves It's important to take curves at a reasonable speed. When you turn the system off, a chime will sound and the TRAC OFF warning light will come on and stay on. If the traction control system is limiting wheel spin when you press the button to turn the system off, the warning light will come on and the system will turn off right away. You can turn the system back on at any time by pressing the button again. The TRAC OFF warning light should go off. A lot of the "driver lost control" accidents mentioned on the news happen on curves. Here's why: Experienced driver or beginner, each of us is subject to the same laws of physics when driving on curves. The traction of the tires against the road surface makes it possible for the vehicle to change its path when you turn the front wheels. If there's no traction, inertia will keep the vehicle going in the same direction. If you've ever tried to steer a vehicle on wet ice, you'll understand this. The traction you can get in a curve depends on the condition of your tires and the road surface, the angle at which the curve is banked, and your speed. While you're in a curve, speed is the one factor you can control. 4-10