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Buick LaCrosse Fog / DRL Light Bulb Replacement Guide
How to change a burnt out fog or DRL (daytime running lamp) light bulb in a 2nd generation 2010-2016 Buick LaCrosse.

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2016 LaCrosse DRL Light
Turn Front Wheels
Plastic Wheel Well Liner
This automotive maintenance tutorial was specifically written to assist owners of the second generation (2010, 2011, 2012, 2013, 2014, 2015 & 2016) GM Buick LaCrosse sedan in changing a burnt out fog light bulb or the DRL (daytime running lamp) in the front bumper cover (depending on the model year).

Owners of other General Motors vehicles such as the Chevrolet Impala, Monte Carlo, Malibu, Spark, Sonic, Cruze, Volt, SS, Camaro, Caprice, Corvette, Trax, Equinox, Traverse, Tahoe, Suburban, Colorado, Silverado, Buick Verano, Regal, Cascada, Encore, Enclave, Envision, GMC Canyon, Sierra, Terrain, Acadia, Yukon, Savana, Cadillac CT6, ATS-V, ATS, ELR, CTS, XTS, XT5, SRX, Escalade and Holden Commodore may also find these DIY instructions to be helpful.

The 2010, 2011, 2012, 2013 & 2014 model years are equipped with halogen Fog Light bulbs which are part number H11.

Newer 2015 & 2016 LaCrosse sedans have DRL (daytime running lamps) which are part number 7443 or (W21/5W).

Loosen Counterclockwise
Torx T15 Screws
Third T-15 Screw
The first step is to turn the steering all the way in the opposite direction of the burnt out light bulb.

Turning the front wheels will create more working room in the wheel well.

Remove the four screws along the front outer edge of the black plastic wheel well liner or "splash guard" by turning them counterclockwise with a Torx T15 screwdriver.

Remove 4th Screw
Under Bumper - 3 Fasteners
Two 7mm Screws
Set the four screws aside in a safe place.

There are three fasteners on the underside of the bumper cover. (I didn't remove them at first but had to later on.)

Remove the two hex head screws with a 7mm socket and a 1/4" drive ratcheting wrench.

Then remove the other screw by turning it counterclockwise with a Torx T-20 screwdriver.

Torx T20 Screw
Pull Back Wheel Well Liner
Old # 7443 (W21/5W)
Pull back the plastic wheel well liner to access the bulb socket.

If your LaCrosse is equipped with fog lights, rotate the base of the old bulb 1/4 turn counterclockwise and pull it straight out of the socket. Release the electrical connector from the old bulb.

Push the power plug on to the base of a new # H11 halogen bulb, re-insert it in to the housing and rotate it 1/4 turn clockwise to secure it in place.

For the 2015 & 2016 LaCrosse, rotate the DRL bulb socket 1/4 turn counterclockwise and pull it straight out of the housing.

Pull the old wedge base bulb straight out of the socket and push in a new # 7443 (or W21/5W) bulb.


Empty Bulb Socket
Remove 7mm Screws
Pull Back Plastic Cover
I had trouble installing the new bulb through the wheel well liner and had to completely remove the other fasteners on the bottom edge of the bumper cover.
Reach In To Bulb Socket
Push In New 7443 Bulb
1/4 Turn Clockwise - Lock
Re-insert the DRL bulb socket in to the housing and rotate it 1/4 turn clockwise to secure it in place.
Replace 7mm Screws
Tighten Clockwise
Replace T15 Screws
Replace the two 7mm screws under the bumper cover and the one Torx T20 screw by turning them clockwise.
Tighten Clockwise
Splash Guard Secure
Test New Fog / DRL Bulb
Replace the four Torx T15 screws along the outer edge of the wheel well liner by tightening them in the clockwise direction.

If your LaCrosse has fog lights, test the new bulbs by turning on the headlights and activating the fog light switch.

For more, check out my other 2010-2016 Buick LaCrosse DIY Repair & Maintenance Guides.

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