GMC 2010 Sierra - Manual (Page 499)

Engine Overheating
If the vehicle has the DURAMAX
®
Diesel engine, see
the DURAMAX ® Diesel manual for more information.
The vehicle has several indicators to warn of engine
overheating.
You will find a coolant temperature gauge on the
vehicle's instrument panel. See Engine Coolant
Temperature Gauge on page 4‑41.
In addition, you will find ENGINE OVERHEATED STOP
ENGINE, ENGINE OVERHEATED IDLE ENGINE, and
ENGINE POWER IS REDUCED messages in the Driver
Information Center (DIC) on the instrument panel. See
DIC Warnings and Messages on page 4‑66.
You may decide not to lift the hood when this warning
appears, but instead get service help right away. See
Roadside Assistance Program on page 8‑7.
If you do decide to lift the hood, make sure the vehicle
is parked on a level surface.
Then check to see if the engine cooling fans are
running. If the engine is overheating, both fans should
be running. If they are not, do not continue to run the
engine and have the vehicle serviced.
Notice: Engine damage from running your engine
without coolant is not covered by the vehicle
warranty. See Overheated Engine Protection
Operating Mode for information on driving to a
safe place in an emergency.
Notice: If the engine catches fire while driving with
no coolant, the vehicle can be badly damaged. The
costly repairs would not be covered by the vehicle
warranty. See Overheated Engine Protection
Operating Mode on page 6‑41 for information on
driving to a safe place in an emergency.
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