GM Service Manual Online
For 1990-2009 cars only

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

The TRACTION CONTROL ACTIVE message on the Driver Information Center (DIC) will be displayed when the system is limiting wheel spin.

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 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 for more information.


Object Number: 814429  Size: A1

This warning light, along with the TRACTION CONTROL OFF message, will display briefly on the DIC when ETS is not on.

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.

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.


Object Number: 822626  Size: A1

To turn ETS on or off, press the Traction Control button located above the radio.

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.