GM Service Manual Online
For 1990-2009 cars only

Your vehicle may have a Traction Control System (TCS) 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. Also, the traction control system activates the appropriate corner brakes to gain even quicker control to limit wheel spin.


Object Number: 923194  Size: A1

This light is located on the instrument panel cluster.

It will come on when TCS is limiting wheel spin. You may feel or hear the system working, but this is normal.

If your vehicle is in cruise control when the TCS 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 TCS operates in all transmission shift lever positions except park or neutral. 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. See Automatic Transaxle Operation .


Object Number: 814429  Size: A1

This light is located on the instrument panel cluster.

When the system is off, this warning light will come on to let you know if there's a problem, or if the system has been turned off.

When the 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 TCS on. But you can turn the system off if you prefer.

To turn the system on or off, press the TC button located under the climate controls. In order to effectively "rock" the vehicle, you will need to turn off TCS.

If you press the TC button once, the traction control system will turn off and the TCS warning light will come on. Press the TC button again to turn the system back on. The TCS warning light will go off.

When you turn the system off, the TCS warning light will come on and stay on. If the TCS 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.

Adding non-dealer/non-retailer accessories can affect your vehicle's performance. See Accessories and Modifications for more information.