GMC 2010 T-Series, Owner'S Manual

Page: 174 / 294

Engine Coolant
The cooling system in the vehicle is filled with
DEX-COOL
®
engine coolant. This coolant is designed
to remain in the vehicle for five years or 150,000 miles
(240 000 km), whichever occurs first.
The following explains the cooling system and how to
check and add coolant when it is low. If there is a
problem with engine overheating, see
Engine
Overheating on page 5 ‑ 29 .
What to Use
{
WARNING:
Adding only plain water to the cooling system can
be dangerous. Plain water, or some other liquid
such as alcohol, can boil before the proper
coolant mixture will. The vehicle's coolant warning
system is set for the proper coolant mixture. With
plain water or the wrong mixture, the engine could
get too hot but you would not get the overheat
warning. The engine could catch fire and you or
others could be burned. Use a 50/50 mixture of
clean, drinkable water and DEX-COOL
®
coolant.
Use a 50/50 mixture of clean, drinkable water and
DEX-COOL
®
coolant. If using this mixture, nothing else
needs to be added. This mixture:
. Gives freezing protection down to − 34°F ( − 37°C),
outside temperature.
. Gives boiling protection up to 265°F (129°C),
engine temperature.
. Protects against rust and corrosion.
. Will not damage aluminum parts.
. Helps keep the proper engine temperature.
Notice: If an improper coolant mixture is used, the
engine could overheat and be badly damaged. The
repair cost would not be covered by the vehicle
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core, and
other parts.
Notice: If you use extra inhibitors and/or additives
in your vehicle's cooling system, you could damage
your vehicle. Use only the proper mixture of the
engine coolant listed in this manual for the cooling
system. See
Part C: Recommended Fluids and
Lubricants on page 6 ‑ 28 for more information.
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