2008 Buick LaCrosse Owner's Manual - Page 240

Traction Control System (TCS) Your vehicle may have a Traction Control System (TCS) 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. It may also upshift the transmission to limit wheel spin. You may feel or hear the system working, but this is normal. The TRACTION CONTROL ACTIVE message on the Driver Information Center (DIC) will be displayed when the system is limiting wheel spin. If the vehicle is in cruise control when the TCS begins to limit wheel spin, the cruise control will automatically disengage. When road conditions allow safe use of the cruise control, it can be used again. See Cruise Control on page 3-10. The TCS operates in all transmission shift lever positions. But the system can upshift the transmission only as high as the shift lever position that was chosen, so use the lower gears only when necessary. See Automatic Transmission Operation on page 2-29. This light, along with the TRACTION CONTROL OFF message, will display on the DIC for three seconds when the TCS is not on. If there is a problem with the system, the SERVICE TRACTION SYSTEM message will also come on in the DIC. When this warning light is on, the system will not limit wheel spin. Adjust driving accordingly. To limit wheel spin, especially in slippery road conditions, you should always leave the TCS on. But you can turn the system off if you ever need to. The TCS should be turned off if the vehicle ever gets stuck in sand, mud or snow and rocking the vehicle is required. See Rocking Your Vehicle to Get It Out on page 4-21 and If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow on page 4-20. To turn the TCS on or off, press the TCS button located above the radio. 4-6