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GMC 1998 Yukon - How to Add Coolant

GMC 1998 Yukon
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If
it
isn’t,
you
may have
a
leak
in
the
radiator hoses,
heater hoses, radiator, water pump or somewhere
else
in
the cooling system.
Heater and radiator hoses, and other engine
parts, can be very hot. Don’t touch them.
If
you
do, you can be burned.
Don’t run the engine if there
is
a
leak. If you run
the engine,
it could lose all coolant. That could
cause an engine fire, and you could be burned.
Get any leak fixed before you drive the vehicle.
NOTICE:
Engine damage from running your engine
without coolant isn’t covered by your warranty.
How
to
Add
Coolant to the Coolant
Recovery
Tank
--
Gasoline Engines
If
you
haven‘t found
a
problem yet, but
the
coolant level
isn’t at or above
the
COLD
mark, add
a
50/50
mixture
of
Clem2
~.v~rter
(preferably distilled) and
DEX-COOL@
engine coolant at the coolant recovery tank. (See
“Engine Coolant”
in
the Index for more information.)
F-
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 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 wouldn’t
get the overheat warning. Your engine could
catch f?re and you or others could be burned.
Use
a
50/50
mixture
of
clean water and
DEX-COOL@
coolant.
If
there seems to be
no
leak, start the engine again. See if
the engine cooling
fan
speed increases when idle speed is
doubled by pushing the accelerator pedal down.
If
it
doesn’t, your vehicle needs service.
Turn
off the engine.
5-16

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