Buick 2009 Lucerne - Manual (Page 306)

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 filter:
1. Remove the two screws on the top of the engine air
cleaner/filter cover.
2. Lift up the outboard side of the cover at an angle
while pulling toward you. This is necessary due to
the two hinges located on the inboard side of
the cover.
3. Remove the engine air cleaner/filter and any loose
debris that may be found in the air cleaner base.
4. Inspect or replace the air filter element.
To reinstall the cover:
1. Align the two hinges located on the inboard side of
the cover.
2. Push the cover slightly down and towards the
engine to engage the tabs in the hinges and
align the two screws.
3. Tighten the two screws on the top of the engine air
cleaner/filter cover.
{ CAUTION:
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.
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