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Pontiac 1997 Grand Prix Owner's Manual page 251

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NOTICE:
Engine damage from running your engine
without coolant isn't covered by your warranty.
_I
If there seems to be no leak, with the engine on, check to
see if the electric engine fans are running. If the engine
is overheating and the key
is
on, both fans should be
running. If they aren't, your vehicle needs service.
How to Add Coolant to the Coolant
Recovery Tank
If you haven't found a problem yet, but the coolant level
isn't at the COLD mark, add a 50/50 mixture of clean
water
(preferably distilled) and DEX-COOL
antifreeze at the coolant recovery tank. (See "Engine
Coolant" in the Index for more information.)
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid like alcohol, can boil before the proper
coolant mix will. Your vehicle's coolant warning
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 DEX-COOL antifreeze.
I
NOTICE:
In cold weather, water can freeze and crack the
engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mix.

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Grandprix 1997