Buick 2007 LaCrosse Owner's Manual page 359

How to Inspect the Engine
Air Cleaner/Filter
To inspect the air cleaner/filter, remove the filter
from the vehicle and lightly shake the filter to
release loose dust and dirt. If the filter remains
caked with dirt, a new filter is required.
To inspect or replace the engine air cleaner/filter
do the following:
1. Lift the filter cover tabs on top of the engine
air cleaner/filter housing.
2. Push the filter cover housing toward the
engine.
3. Pull out the filter.
4. Inspect or replace the engine air cleaner/filter.
See Normal Maintenance Replacement Parts
on page 471.
5. To reinstall the cover, position the tabs
through the slots on the housing. A notch
on the sides of the filter cover will indicate
the correct engagement.
6. Push the cover tabs on top of the housing
to lock the cover in place.
CAUTION:
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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. If it is not there
and the engine backfires, you could be
burned. Do not drive with it off, and be
careful working on the engine with the
air cleaner/filter off.
Notice: If the air cleaner/filter is off, a backfire
can cause a damaging engine fire. And, dirt
can easily get into your engine, which will
damage it. Always have the air cleaner/filter in
place when you are driving.
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