2005 Buick Terraza Owner's Manual - Page 253

Traction Control System (TCS) Your vehicle may have a traction control system that limits wheel spin. This is especially useful in slippery road conditions. On a front-wheel-drive vehicle, the system operates if it senses that one or both of the front wheels are spinning or beginning to lose traction. On an all-wheel-drive vehicle, the system will operate if it senses that any of the wheels are spinning or beginning to lose traction. When this happens, the system brakes the spinning wheel(s) and/or reduces engine power to limit wheel spin. The TRACTION CONTROL ACTIVE message will come on in the Driver Information Center (DIC) when the traction control system is limiting wheel spin. 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 re-engage the cruise control. This warning light will come on to let you know if there is a problem with your traction control system. When this warning light is on, the system will not limit wheel spin. Adjust your driving accordingly. If the SERVICE TRACTION SYSTEM message in the DIC comes on and stays on or comes on while you are driving, there's a problem with your traction control system. Have the traction control system serviced by your GM dealer as soon as possible. When this warning message is on, the TRACTION CONTROL OFF message in the DIC will come on to remind you that the system will not limit wheel spin. Adjust your driving accordingly. 4-9