Pontiac 1993 Grand Am Owner's Manual page 222

Engine 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 the Index under
Engine Overheating.
The proper coolant for your Pontiac
will:
Give freezing protection down to
Give boiling protection up to 262°F
Protect against rust and corrosion.
Help keep the proper engine
-34°F (-37°C).
(128°C).
temperature.
Let the warning
should.
lights work as they
What to Use:
Use a mixture of one-half clean water
(preferably distilled) and one-half
antifreeze that meets "GM Specification
1825-M," which won't damage
aluminum parts. You can also use a
recycled coolant conforming to GM
Specification 1825-M with a complete
coolant flush and refill. If you use this
mixture, you don't need to add anything
else.
CAUTION
I
A
Adding
only
plain water
ta
L
p u r cooling system can
be
dangerous.
P l a i n water, or some
other liquid like alcohol,
can
boil
b e b e the proper coolant mix will.
system is set
for
the
proper coolant
mix.
With plain water or
the
wrong mix, 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 mix
of clean water and a proper
antifreeze.
Y o u r v&hicle's
coolant
warning
2 2 1
.