GM Service Manual Online
For 1990-2009 cars only

Use your fog lamps for better vision in foggy or misty conditions. Your ignition must be in RUN for your fog lamps to work.

(Fog Lamps): Press this button located on the exterior lamps control to turn the fog lamps on or off. The fog lamps will go off whenever you turn on the high-beam headlamps. When the high beams are turned off, the fog lamps will come on again.

(Fog Lamp Indicator Light): This light located on the exterior lamps control illuminates when the fog lamps are turned on.

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