2003 Buick Century Owner's Manual - Page 185

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 transaxle to limit wheel spin. This light will come on when your Enhanced Traction System is limiting wheel spin. See Enhanced Traction System Warning Light on page 3-33. The Enhanced Traction System operates in THIRD (3) and OVERDRIVE (@). If you are in THIRD (3),the system can upshift the transaxle to OVERDRIVE The Enhanced Traction System is turned off in SECOND (2) or FIRST (1) gear. See Automatic Transaxle Operation on page 2-23. (a). TRAC OFF When the system is on, this warning light will come on to let you know if there's a problem. LOW TRAC You may feel or hear the system working, but this is normal. If your vehicle is in cruise control when the enhanced traction 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. See 'Cruise Control" under Turn Signal/Multifunction Lever on page 3-5. See Enhanced Traction System Warning Light on page 3-33. When this warning light is on, the system will not limit wheel spin. Adjust your driving accordingly. To limit wheel spin, especially in slippery road conditions, you should always leave the Enhanced Traction System on. But you can turn the system off if you ever need to. You should turn the system off if your vehicle ever gets stuck in sand, mud or snow and rocking the vehicle is required. See "Rocking Your Vehicle To Get It Out" under If You Are Stuck: In Sand, Mud, Ice or Snow on page 4-31. 4-10