GM Service Manual Online
For 1990-2009 cars only

The fog lamp button is located on the instrument panel, to the left of the steering wheel.

The ignition must be on to turn the fog lamps on.

Press to turn the fog lamps on and off. An indicator light on the instrument panel cluster 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 will 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.