Chevrolet B7 2001 Owner's Manual page 128

CAUTION:
Gasoline Engines Only: 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.
To replace the engine air cleaner/filter element:
1. Remove the finger screws holding the housing cover.
2. Remove the cover and replace the filter element.
3. Be sure that the finger screws are securely tightened
when reinstalling the element and housing cover.
NOTICE:
Gasoline Engines Only: 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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