Chevrolet 2007 Avalanche Owner's Manual page 461

3. Remove the engine air cleaner/filter from the
housing. Care should be taken to dislodge as
little dirt as possible.
4. Clean the engine air cleaner/filter sealing
surfaces and the housing.
5. Inspect or replace the engine air cleaner/filter.
6. Reinstall the cover and tighten the screws.
7. Reset the air filter restriction indicator, if
the vehicle has one, by pressing the top button
on the indicator.
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 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.
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