Buick 2009 Enclave - Manual (Page 290)

Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL
® engine
coolant. The 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 5-22.
What to Use
{ CAUTION
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.
5-18 Service and Appearance Care