GM Service Manual Online
For 1990-2009 cars only

For vehicles with fog lamps, the button for this feature is located on the instrument panel, to the left of the steering wheel.

The ignition must be on for the fog lamps to work.

Press to turn the fog lamps on or off. An indicator light comes on when the fog lamps are on. The parking lamps automatically turn on and off when the fog lamps are turned on and off. The fog lamps turn off while the high-beam headlamps are turned on.

Some localities have laws that require the headlamps to be on along with the fog lamps.