Hummer 2004 H2 - Manual (Page 334)

To inspect or replace the air cleaner/filter, do the
following:
1. Loosen the screws on the cover.
2. Lift the cover upward and set it aside.
3. Pull the air cleaner/filter up and out from the air
cleaner housing. Care should be taken to dislodge
as little dirt as possible.
4. Clean the air cleaner/filter sealing surface and the
housing.
5. Reinstall the new air cleaner/filter.
6. Reinstall the cover and tighten the screws.
Refer to the Maintenance Schedule to determine when
to replace the engine air cleaner/filter. See Owner
Checks and Services on page 6-9.
{ 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 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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