Chevrolet 2003 Impala Owner's Manual page 280

What to Use
Use a mixture of one-half clean, drinkable water and
one-half DEX-COOL@ coolant which won't damage
aluminum parts. If you use this coolant mixture,
you don't need to add anything else.
Adding o
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 esslant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you wouldn't get the overheat warning.
Your engine could catch fire and you or others
could be burned. Use a 50/50 mixture of clean,
drInkE!h!e wster snc! D E X - c m P Icon!ant-
if you have to add coolant more than four times a year,
have your dealer check your cooling system.
Notice: If you use the proper coolant, you don't
have to add extra inhibitors or additives which claim
to improve the system. These can be harmful.
Notice: If you use an improper coolant mixture,
your engine could overheat and be badly damaged.
The repair cost wouldn't be covered by your
and crack the engine, radiator, heater core and
other parts.
warrznty. Tcc much water In the mixture can freeze
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The coolant recovery tank
is located between the
power steering fluid
reservoir and the
underhood fuse block in
the engine compartment
on the passenger's side of
the vehicle. See Engine
Compartment Overview on
page
5-
12 for more
information on location.
The vehicle must be on a level surface. When your
engine is cold, the coolant level should be at the COLD
mark or a little higher. When your engine is warm,
the level should be up to the HOT mark or a little higher.
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