Engine Overheating - GMC Sierra 2016 Owner's Manual Supplement

mixture to the coolant surge
tank until the level reaches the
indicated mark.
5. Replace the pressure cap
tightly.
6. Verify coolant level after the
engine is shut off and the
coolant is cold. If necessary,
repeat coolant fill procedure
Steps 1-6.
Caution
If the pressure cap is not tightly
installed, coolant loss and
possible engine damage may
occur. Be sure the cap is properly
and tightly secured.

Engine Overheating

There is an engine coolant
temperature gauge on the
instrument cluster. See the owner
manual.
If Steam Is Coming from the
Engine Compartment
Warning
Steam from an overheated engine
can burn you badly, even if you
just open the hood. Stay away
from the engine if you see or hear
steam coming from it. Just turn it
off and get everyone away from
the vehicle until it cools down.
Wait until there is no sign of
steam or coolant before you open
the hood.
If you keep driving when the
engine is overheated, the liquids
in it can catch fire. You or others
could be badly burned. Stop the
engine if it overheats, and get out
of the vehicle until the engine
is cool.
Vehicle Care
Caution
Running the engine without
coolant may cause damage or a
fire. Vehicle damage would not be
covered by the vehicle warranty.
If No Steam Is Coming from
the Engine Compartment
A Driver Information Center (DIC)
message, along with a low coolant
condition, can indicate a serious
problem.
If there is an engine overheat
warning and the vehicle does not
have a low coolant condition, and
no steam is heard or seen, the
problem may not be too serious.
Sometimes the engine can get a
little too hot when the vehicle:
Climbs a long hill on a hot day.
Stops after high-speed driving.
Idles for long periods in traffic.
Tows a trailer. See Driving on
Grades under Driving
Characteristics and Towing Tips
in the owner manual.
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