The fog lights on a 2015 Buick LaCrosse are controlled by a small push button on the left-side headlight control switch mounted on the dash near the steering column. You must have the exterior lights turned on to use them.
Where to look on the dash
On the driver's side of the steering wheel, the left-hand headlight control switch sits in the dash cluster. The fog light control is built into this switch, typically as a separate inner button or push area marked with the fog lamp icon.
What you will see
The switch usually features settings for Off, Parking/Side Lamps, Headlights On, and Auto (where equipped). In the center or on the inner portion is a dedicated fog light button. Fog lights operate only when the exterior lighting is active.
How to operate the fog lights
To turn fog lights on, follow these steps:
- Turn the headlight control knob to a position that powers the exterior lights (such as Parking Lamps or Headlights On).
- Press the inner fog light button on the headlight switch to activate the fog lights. The fog icon on the switch should illuminate when on.
- Press the fog light button again to turn them off.
- If the switch does not respond, confirm your vehicle is equipped with fog lights—some trims or regions may not include them—and check the fuse if necessary.
Following these steps will enable you to operate the fog lights when your LaCrosse is equipped with them. If the switch is not present or does not work, consult the owner's manual or a Buick dealer to verify equipment and potential issues.
What if your LaCrosse has no fog lights?
Some 2015 Buick LaCrosse models, depending on trim level or market, may not be equipped with fog lights. If there is no fog light icon on the headlight switch and no dedicated button, your car likely does not have fog lights installed.
Summary
The fog light switch on a 2015 Buick LaCrosse is located on the left side of the steering column, integrated into the headlight control switch on the dash. Turn on the exterior lights and press the fog light button to activate them. If your model lacks the switch or it doesn’t respond, it may not be equipped with fog lights or there may be a fuse or electrical issue to check.