GMC 2012 Sierra - Manual (Page 404)

Black plate (18,1) GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
10-18 Vehicle Care
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.
{
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.
Cooling System
If the vehicle has the Duramax ®
Diesel engine, see the Duramax ®
Diesel Supplement for more
information.
The cooling system allows the
engine to maintain the correct
working temperature.
5.3 L Engine Shown (4.3 L, 4.8 L,
6.0 L and, 6.2 L Engines Similar)
A. Coolant Surge Tank
B. Coolant Surge Tank
Pressure Cap
C. Engine Cooling Fan
(Out of View)
{
WARNING
An electric engine cooling fan
can start even when the engine
is not running. To avoid injury,
always keep hands, clothing,
and tools away from any engine
cooling fan.