GM Service Manual Online
For 1990-2009 cars only

The 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 and apply the front brakes to limit wheel spin.


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This light will flash when the TCS is limiting wheel spin.

The system may be heard or felt while it is working, but this is normal.

If cruise control is being used when TCS begins to limit wheel spin, the cruise control will automatically disengage. Cruise control may be reengaged when road conditions allow. See Cruise Control.

The TCS operates in all transmission shift lever positions. But the system can upshift the transmission only as high as the shift lever position chosen, so use the lower gears only when necessary. See Automatic Transmission Operation.


Object Number: 1545635  Size: A1

When the system is on, this warning light comes on and stays on if there is a problem.

A SERVICE TRACTION CONTROL message also appears on the DIC. When this warning light is on, the system will not limit wheel spin. Adjust your driving accordingly. See DIC Warnings and Messages for more information.

To limit wheel spin, especially in slippery road conditions, TCS should always be left on. But the system can be turned off if needed. Turn the system off if the vehicle gets stuck in sand, mud or snow and rocking the vehicle is required. See Rocking Your Vehicle to Get It Out and If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow for more information.


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To turn the system on or off, press the Traction Control button located on the instrument panel.

When the system is turned off, the traction control warning light comes on and TRACTION CONTROL OFF appears on the DIC. If the traction control system is limiting wheel spin when the button is pressed to turn the system off, the warning light comes on and the system will turn off right away.

Press the Traction Control button again to turn the system back on. The Traction Control warning light should go off.

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