2009 Buick LaCrosse Owner's Manual - Page 245

If cruise control is being used when ETS begins to limit wheel spin, the cruise control automatically disengages. The cruise control can be reengaged when road conditions allow. See Cruise Control on page 3-10 for more information. 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 2-26 for more information. This warning light, along with the TRACTION CONTROL OFF message, will display briefly on the DIC when ETS is not on. To limit wheel spin, especially in slippery road conditions, ETS should always be left on. But the system can be turned off if needed. ETS should be turned off if the vehicle ever gets stuck in sand, mud or snow and rocking the vehicle is required. See If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow on page 4-19. To turn ETS on or off, press the Traction Control button located above the radio. 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. When ETS is turned off, the ETS warning light will come on along with the TRACTION CONTROL OFF message on the DIC. It will turn off when ETS is turned back on. If ETS is limiting wheel spin when the traction control button is pressed, the ETS warning light comes on and ETS will turn off right away. 4-9