GMC 2011 Sierra Denali Owner's Manual page 359

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.
Care should be taken to
dislodge as little dirt as possible.
4. Clean the engine air cleaner/
filter sealing surfaces and the
housing.
Vehicle Care
5. Inspect or replace the engine air
cleaner/filter.
6. Reinstall the cover and tighten
the screws.
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.
10-15