What To Use - Chevrolet 2009 Express Owner's Manual

What to Use

CAUTION:
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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
5-26
Use a 50/50 mixture of clean, drinkable water and
DEX-COOL
needs to be added. This mixture:
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•
•
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coolant.
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coolant. If using this mixture, nothing else
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.