Chevrolet 2003 Silverado 1500 Pickup Owner's Manual page 399

I
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 cleanedfilter 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.
Operating the engine with the air cleanedfilter
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.
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 cleanedfilter in place when
you're driving.
Refer to the Maintenance Schedule to determine when
to replace the engine air cleaner/filter. See Part B:
Owner
Checks and Services on page 6- 11.
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