What To Use - Hummer H2 2010 Owner's Manual

Notice: Using coolant other than DEX COOL
cause premature engine, heater core, or radiator
corrosion. In addition, the engine coolant may
require changing sooner, at the first maintenance
service after each 30,000 miles (50 000 km) or
24 months, whichever occurs first. Any repairs
would not be covered by the vehicle warranty.
Always use DEX COOL
vehicle.

What to Use

Use a mixture of one-half clean, drinkable water and
®
one-half DEX-COOL coolant which will not damage
aluminum parts. If you use this coolant mixture, nothing
else needs to be added.
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 would not get the overheat
®
®
(silicate free) coolant in the
(Continued)
can
WARNING: (Continued)
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
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.
If coolant needs to be added more than four times a
year, have your dealer check the cooling system.
Notice: If extra inhibitors and/or additives are used
in the vehicle's cooling system, the vehicle could be
damaged. Use only the proper mixture of the engine
coolant listed in this manual for the cooling system.
See Recommended Fluids and Lubricants on
page 7 10 for more information.
®
coolant.
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