GM Service Manual Online
For 1990-2009 cars only

The fog lamp button is located on the instrument panel on the left side of the steering column.

For vehicles with fog lamps, press to turn the fog lamps on or off. An indicator light in the button is lit when the fog lamps are on. The ignition must be on to use the fog lamps. 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.