Turn on the headlights to low beam or Auto, then activate the fog lights using the appropriate control—either the dedicated fog-light button on the headlight switch or the end of the turn-signal lever, depending on your trim. The fog lights will illuminate when activated.
In practice, the 2016 LaCrosse commonly requires the headlights to be on for the fog lights to operate. Some trims feature a small fog-light button on the headlight control, while others use the stalk on the steering column to trigger the lights. If you can’t locate a control, check the owner's manual for your exact build or look for the dash indicator that signals when the fog lights are active.
Fog light control locations
The exact control location and method can vary by trim and options. Here are the two most common setups you’ll encounter on the 2016 LaCrosse.
Headlight switch with dedicated fog button
On some configurations, rotate the headlight control knob to the low-beam or Auto position and press the dedicated fog-light button. The fog-light symbol on the switch and a dash indicator typically confirm activation.
Stalk-mounted fog control
On other configurations, with the low beams on, activate the fog lights by pulling the end of the turn-signal lever toward you. A dash indicator should illuminate to show they’re on. Releasing the lever ends the fog-light function, though some models require another pull to toggle off depending on the system.
Step-by-step activation
Follow these steps to turn on fog lights in a typical 2016 Buick LaCrosse.
- With the ignition on, set the exterior lights to Low Beam or Auto.
- If your model has a dedicated fog-light button on the headlight switch, press it to engage the fog lights.
- If your model uses the stalk control, pull the end of the turn-signal lever toward you to activate the fog lights while the low beams are on.
- Look for the fog-light indicator on the dash confirming they are on.
Once the headlights are turned off or the ignition is off, the fog lights will switch off automatically or when you toggle the control again, depending on the system.
Troubleshooting and tips
If the fog lights do not come on after following the steps above, try these checks before seeking service.
- Verify the headlights are on in Low Beam or Auto mode; fog lights typically won't operate with Daytime Running Lights alone.
- Check for the dash indicator to confirm activation; if you don’t see it, recheck the correct control for your trim.
- Inspect the relevant fuse and the bulbs; a blown bulb or fuse is a common cause of inoperable fog lights.
- Consult the owner's manual for your exact trim, as some configurations or optional packages can alter the fog-light control.
If problems persist, contact a Buick dealer or a qualified technician for a diagnostic, especially if the fuse and bulbs test good but the lights still won’t engage.
Summary
In most 2016 Buick LaCrosse models, fog lights activate only when the low-beam headlights are on. Depending on the trim, use the dedicated fog-light switch on the headlight control, or pull the end of the turn-signal lever while the low beams are engaged. If the lights fail to come on, verify the headlight setting, dash indicator, fuses, and bulbs, and consult the owner’s manual for model-specific instructions.