GMC 2012 Sierra Series Owner's Manual page 418

10-18 Vehicle Care
Replacing the Engine Air Cleaner/
Filter
1. Locate the air cleaner/filter
assembly. See Engine
Compartment Overview on
page 10 6.
2. Loosen the four screws on the
cover of the housing and lift up
the cover.
3. Remove the engine air cleaner/
filter from the housing. Take care
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.
I n f o r ma t i o n P r o v i d e d b y :
WARNING
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. Use caution when
working on the engine and do not
drive with the air cleaner/filter off.