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Specification 1825-M with
a
complete coolant flush and refill. Use
GM
Engine Coolant Supplement (sealer) with any complete coolant change.
If
you use these, you don't need to add anything else.
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 cwlant
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 dean
water and
a
proper anti€reeze,
I
281
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