GM Service Manual Online
For 1990-2009 cars only

For vehicles with fog lamps, the control is located next to the exterior lamps control on the instrument panel to the left of the steering column.

(Fog Lamps): Press the button to turn the fog lamps on or off. A indicator light comes on in the instrument panel cluster. The ignition must be in the ON/RUN position for the fog lamps to come on.

When the fog lamps are turned on, the headlamps automatically turn on.

When the headlamps are changed to high-beam, the fog lamps also go off. When the high-beam headlamps go off, the fog lamps will come on again.

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