2003 Buick Regal Owner's Manual - Page 174

Full-Range Traction Control System Your vehicle may have a Full Range Traction Control System that limits wheel spin. This is especially useful in slippery road conditions. The system operates only if it senses that one or both of the front wheels are spinning or beginning to lose traction. When this happens, the system works the front brakes and reduces engine power to limit wheel spin. The low traction light will come on when the traction control system is limiting wheel spin. See Low Traction Light on page 3-32. TRAC OFF This light should come on briefly when you start the engine. If it stays on or comes on while you are driving, there's a problem with your traction control system. See Traction Control System (TCS) Warning Light on page 3-31. When this warning light is on, the system will not limit wheel spin. Adjust your driving accordingly. The traction control system automatically comes on whenever you start your vehicle. To limit wheel spin, especially in slippery road conditions, you should always leave the system on. But you can turn the traction control system off if you ever need to. You should turn the system off if your vehicle ever gets stuck in sand, mud or snow and rocking the vehicle is required. See "Rocking Your Vehicle to Get It Out" under If You Are Stuck: In Sand, Mud, Ice or Snow on page 4-30. LOW TRAC You may feel or hear the system working, but this is normal. If your vehicle is in cruise control when the traction control system begins to limit wheel spin, the cruise control will automatically disengage. When road conditions allow you to safely use it again, you may reengage the cruise control. See "Cruise Control'' under Turn SignaVMultifunction Leveron page 3-7. 4-9