2009 Buick LaCrosse Owner's Manual - Page 244

This light, along with the TRACTION CONTROL OFF message, will display briefly on the DIC when TCS is not on. When TCS is turned off, the TCS warning light will come on along with the TRACTION CONTROL OFF message on the DIC. It will turn off when TCS is turned back on. If TCS is limiting wheel spin when the TCS button is pressed, the TCS warning light will come on and TCS will turn off right away. Adding non-dealer/non-retailer accessories can affect the vehicle's performance. See Accessories and Modifications on page 5-3 for more information. 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, TCS should always be left on. But the system can be turned off if needed. 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 4-20 and If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow on page 4-19. To turn TCS on or off, press the TCS button located above the radio. Enhanced Traction System (ETS) The 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. The system may be heard or felt while it is 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. 4-8