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Buick LaCrosse Engine Air Filter Replacement Guide
How to change the engine air filter element in a 2nd generation 2010 to 2016 Buick LaCrosse with the 3.6L V6 motor.

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2016 LaCrosse Engine Air Box
Loosen Counterclockwise
Front Left Corner Screw
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 cleaning or changing the engine air filter element for the LLT or LFX 3.6 liter V6 motors.

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 only tool needed to access and replace the engine air filter is a Torx T25 star bit screwdriver.


A few compatible replacement filters with their part numbers are as follows: Fram CA10685, ACDelco A3176C, Wix 49894, Mahle LX 3020, Beck Arnley 042-1855 and Purolator A46130.
Left Rear Screw
Right Rear Screw
Slide Cover To Right
The first two steps are to open the hood and then move to the left (passenger) side of the engine bay.

The black plastic engine air box is located just behind the passenger headlight assembly.

Loosen the four screws that secure the air box cover in place by turning them counterclockwise with a Torx T-25 star bit screwdriver. There is one screw at each of the four corners of the cover.

The screws should remain attached to the air box cover.

Slide the top half of the air box to the right (driver) side, in order to disengage the plastic tabs from their slots.

Tabs & Slots
Air Box Cover Released
Lift Off Air Box Cover
Lift the air box cover to access the old filter.
Pull Out Old Air Filter
Old Filter Removed
Inspect Both Sides
Pull the old filter straight out of the bottom half of the air box.

Inspect both sides of the old filter.

If the old filter is dark grey or black and clogged with dirt, dust, hair, soot, pollen, insects, leaves, twigs and other debris, it should be replaced with a new element.

I recommend buying the Fram CA10685 engine air filter since it has excellent reviews on Amazon.

If the old filter is relatively clean, just tap out the large debris and remove any fine dust with a vacuum cleaner.


Clean Bottom Half Air Box
Clean With Vacuum
Install New Air Filter
If your vacuum has a crevice attachment, clean our any sand or debris in the bottom half of the air box.

Insert the new filter in to the lower half of the air box with the pleats facing down and the plastic mesh screen facing up towards you.

Lower Top Half Air Box
Push Tabs In To Slots
Tighten Four T25 Screws
Lower the air box cover down and slide it to the left to secure the plastic tabs in to their corresponding slots.
Right Rear Screw
Front Left Screw
Engine Air Filter Replaced
Tighten the four screws by turning them clockwise with the Torx T-25 screwdriver until they are snug.

Try to avoid over tightening the screws to prevent from cracking the plastic air box.

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

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