Engine Coolant - GMC duramax diesel 2016 Supplement Manual

Warning (Continued)
Do not run the engine if there is a
leak. If you run the engine, it
could lose all coolant. That could
cause an engine fire, and you
could be burned. Get any leak
fixed before you drive the vehicle.
Caution
Using coolant other than
®
DEX-COOL can cause
premature engine, heater core,
or radiator corrosion. In addition,
the engine coolant could require
changing sooner. Any repairs
would not be covered by the
vehicle warranty. Always use
DEX-COOL (silicate-free) coolant
in the vehicle.

Engine Coolant

The cooling system in the vehicle is
®
filled with DEX-COOL engine
coolant mixture. See Recommended
Fluids and Lubricants 0 121 and
Maintenance Schedule 0 116.
The following explains the cooling
system and how to add coolant
when it is low. If there is a problem
with engine overheating, see Engine
Overheating 0 109.
A 50/50 mixture of clean, drinkable
water and DEX-COOL coolant will:
Give freezing protection down to
37 °C ( 34 °F).
Give boiling protection up to 129
°C (265 °F).
Protect against rust and
corrosion.
Help keep the proper engine
temperature.
Let the warning lights and
gauges work as they should.
Vehicle Care
Caution
Using coolant other than
®
DEX-COOL can cause
premature engine, heater core,
or radiator corrosion. In addition,
the engine coolant could require
changing sooner. Any repairs
would not be covered by the
vehicle warranty. Always use
DEX-COOL (silicate-free) coolant
in the vehicle.
What to Use
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant which will not damage
aluminum parts. If using this
mixture, nothing else needs to be
added.
Warning
Adding only plain water or some
other liquid to the cooling system
can be dangerous. Plain water
and other liquids, can boil before
(Continued)
105