GM Service Manual Online
For 1990-2009 cars only

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.


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This light will come on when your Enhanced Traction System is engaged and limiting wheel spin.

You may feel or hear the system working, but this is normal.

If your vehicle is in cruise control when the ETS 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 .

The ETS operates in all transmission shift lever positions. But the system can upshift the transmission only as high as the shift lever position you've chosen, so you should use the lower gears only when necessary.


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When the system is on, this warning light will come on to let you know there's a problem.

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 ETS on. But you can turn the system off if you prefer.


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To turn the system on or off, press the traction control button located on the center console under the climate control system.

When you turn the system off, the ETS warning light will come on and stay on. If the ETS is limiting wheel spin when you press the button to turn the system off, the warning light will come on - but the system won't turn off right away. It will wait until there's no longer a current need to limit wheel spin.

You can turn the system back on at any time by pressing the button again. The traction control system warning light should go off.