GM Service Manual Online
For 1990-2009 cars only

Use the fog lamps for better vision in foggy or misty conditions. The fog lamp control is located on the turn signal/multifunction lever.

(Fog Lamps): Turn the fog lamp band on the lever up to and release it, to turn the fog lamps on or off. The band will return to its original position.

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

If the high-beam headlamps are turned on, the fog lamps will also turn off. They will turn back on again when you change back to low-beam headlamps.

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