Chevrolet 1997 Astro Owner's Manual page 275

4ir Cleaner
To remove the air filter, lift the hood, unsnap both clips
and remove the top. After changing the filter, snap both
clips to secure the air cleaner. Be sure the air cleaner lid
is correctly positioned to seal out dust and contaminants
that are harmful to your engine.
Make sure the fresh air hose is still attached after the
filter change.
Refer to the Maintenance Schedule to determine when to
replace the air filter and the crankcase ventilation filter.
See "Scheduled Maintenance" in the Index.
Operating the engine with the air cleaner 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 off.
I
NOTICE:
If the air cleaner 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 in place when you're driving
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