GMC YUKON XL 2003 Manual page 377

To replace the engine air cleaner/filter do the following:
1. Loosen the screws on the cover of the housing
and lift up the cover.
2. Remove the air cleaner/filter from the housing. Care
should be taken to dislodge as little dirt as possible.
3.
Clean the filter sealing surface and the housing.
4. Install the new engine air cleaner/filter.
5. Reinstall the cover and tighten the screws.
Refer to the Maintenance Schedule to determine when
to replace the engine air cleaner/filter. See Part B:
@IAfTer
Checks and Services on page 6-10.
I
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.
Notices If the air cleanedfilter 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 cleanedfilter in place when
you're driving.
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