2008 Buick LaCrosse Owner's Manual - Page 241

When the TCS is turned off, the TCS warning light will come on along with the TRACTION CONTROL OFF message on the DIC. It will disappear when the TCS is turned back on. If the TCS is limiting wheel spin when the TCS button is pressed, the TCS warning light will come on and the TCS will turn off right away. Adding non-dealer/non-retailer accessories can affect your vehicle's performance. See Accessories and Modifications on page 5-3 for more information. If the vehicle is in cruise control when ETS begins to limit wheel spin, the cruise control will automatically disengage. When road conditions allow safe use of it, the cruise control can be used again. See Cruise Control on page 3-10. The ETS operates in all transmission shift lever positions. But the system can upshift the transmission only as high as the chosen shift lever position, so use the lower gears only when necessary. See Automatic Transmission Operation on page 2-29. This warning light, along with the TRACTION CONTROL OFF message, will display on the DIC for three seconds when the ETS is not on. Enhanced Traction System (ETS) Your vehicle may have an Enhanced Traction System (ETS) 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 reduces engine power and 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 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 your driving accordingly. 4-7