Buick 2009 Enclave Owner's Manual page 291

5.3L V8 Engine
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.
5. To reinstall the cover, position the tabs through
the slots on the housing. If your vehicle has one
of the V6 engines, 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 the engine, which will damage it.
Always have the air cleaner/filter in place when
you are driving.
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