Chevrolet 2009 Aveo Owner's Manual page 228

To inspect or replace the air cleaner/filter:
1. Remove the screws and lift off the cover.
2. Inspect or replace the engine air cleaner/filter.
3. Put the cover back on tightly and tighten the screws.
See Additional Required Services on page 6-6 for
replacement intervals.
5-20
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.