Chevrolet 2002 Astro Owner's Manual page 281

To change the engine air cleaner/filter, do the following:
1. Unsnap both clips on the cover.
2. Remove the cover.
3. Change the filter.
4. Snap both clips to secure the engine air
cleaner/filter cover.
Be sure the engine air cleaner/filter cover is correctly
positioned to seal out dust and contaminants that are
harmful to your engine.
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 stops
flame if the engine backfires. If it isn't there,
and the engine backfires, you could be burned.
Don't 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're driving.
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