Pontiac 2005 Grand Am User Manual download pdf (Page 230)

Engine Coolant

The cooling system in your vehicle is ﬁlled with

DEX-COOL

engine coolant. This coolant is designed

to remain in your vehicle for 5 years or 150,000 miles

(240 000 km), whichever occurs ﬁrst, if you add

only DEX-COOL

extended life coolant.

The following explains your cooling system and how to

add coolant when it is low. If you have a problem

with engine overheating, see Engine Overheating on

page 5-24.

A 50/50 mixture of clean, drinkable water and

DEX-COOL

coolant will:

• Give freezing protection down to −34°F (−37°C).

• Give boiling protection up to 265°F (129°C).

• Protect against rust and corrosion.

• Help keep the proper engine temperature.

• Let the warning lights and gages work as they

should.

Notice: Using coolant other than DEX-COOL

may

cause premature engine, heater core or radiator

corrosion. In addition, the engine coolant may

require changing sooner, at 30,000 miles (50 000 km)

or 24 months, whichever occurs ﬁrst. Any repairs

would not be covered by your warranty. Always use

DEX-COOL

(silicate-free) coolant in your 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, you do

not need to add anything else.

{CAUTION:

Adding only plain water to your cooling system

can be dangerous. Plain water, or some other

liquid such as alcohol, can boil before the

proper coolant mixture will. Your vehicle’s

coolant warning system is set for the proper

coolant mixture. With plain water or the wrong

mixture, your engine could get too hot but you

would not get the overheat warning. Your

engine could catch ﬁre and you or others could

be burned. Use a 50/50 mixture of clean,

drinkable water and the proper coolant.

Notice: If you use an improper coolant mixture, your

engine could overheat and be badly damaged. The

repair cost would not be covered by your warranty.

Too much water in the mixture can freeze and crack

the engine, radiator, heater core and other parts.

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Pontiac 2005 Grand Am User Manual Page 230

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