Buick LaCrosse 2011 Owner's Manual page 328

10-16 Vehicle Care
To inspect or replace the engine air
cleaner/filter do the following:
2.4 L L4 Engine
1. Remove the screws on top of
the engine air cleaner/filter
housing.
2. Lift the filter cover housing away
from the engine.
3. Pull out the filter.
4. Inspect or replace the engine air
cleaner/filter.
5. Lower the filter cover housing
toward the engine.
6. Install the screws on the top of
the housing to lock the cover in
place.
3.6 L V6 Engine
1. Remove the screws on top of
the engine air cleaner/filter
housing.
2. Lift the filter cover housing away
from the engine.
3. Pull out the filter.
I n f o r ma t i o n P r o v i d e d b y :
4. Inspect or replace the engine air
cleaner/filter.
5. Lower the filter cover housing
toward the engine.
6. Install the screws on the top of
the housing to lock the cover in
place.
WARNING
Operating the engine with the air
cleaner/filter off can cause you
or others to be burned. The air
cleaner not only cleans the air;
it helps to stop flames if the
engine backfires. Use caution
when working on the engine
and do not drive with the air
cleaner/filter off.
Notice: If the air cleaner/filter is
off, dirt can easily get into the
engine, which could damage it.
Always have the air cleaner/filter
in place when you are driving.