Chevrolet 2005 T-Series Owner's Manual page 169

To inspect or replace the filter and reset the indicator
(if equipped), do the following:
1. Remove all three finger screws and carefully
remove the filter cover.
2. Inspect or replace the engine air cleaner/filter.
3. Be sure that all three finger screws are tightened
securely when reinstalling the filter cover.
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 flame 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 your engine, which will damage it.
Always have the air cleaner/filter in place when you
are driving.
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