Chevrolet Low Cab Forward 4500 2019 Series Owner's Manual page 200

Warning (Continued)
When removing the radiator cap
or engine coolant reserve tank
cap, use a thick cloth to cover the
cap and turn it slowly.
Engine coolant is toxic and must
not be ingested. If the engine
coolant is mistakenly ingested,
seek prompt medical attention.
If the engine coolant gets in your
eyes, rinse your eyes immediately
with a large amount of water for
15 minutes or longer. Also, if your
eyes are still irritated or otherwise
feel abnormal, seek immediate
medical attention.
If the engine coolant gets on your
skin, rinse it off using a soap with
a large amount of water. Also,
if abnormality is seen, seek
medical attention.
Engine coolant is flammable, and
therefore, it must be kept away
from flames and other heat
(Continued)
Warning (Continued)
sources. Engine coolant also
could ignite if it comes in contact
with a hot surface, such as the
exhaust manifold. Exercise
caution to prevent this from
happening.
You and others could be seriously
injured.
Preparing Engine Coolant
To prevent the engine damage to
freezing of the engine coolant and
to protect the cooling system from
corrosion, a mixture of the
recommended type antifreeze and
water. If the engine of the vehicle is
at 30 °C ( 22 °F) or above, the
coolant concentration should be
50%. Direct use of 50/50
Pre-diluted product which is already
diluted to 50% concentration is
recommended. If the outside
temperature engine or vehicle is
used at 30 °C ( 22 °F) or below,
coolant concentration of 55% is
recommended.
Vehicle Care
It is the owner s responsibility to:
Maintain the engine cooling
system freeze protection at or
above 30 °C ( 22 °F) (at or
below 30 °C ( 22 °F) in colder
climates to ensure protection
against corrosion and loss of
engine coolant from boiling.
A 50/50 (55/45 for colder
climates) mixture of the
recommended type antifreeze
and water will provide freeze
protection to at or above 30 °C
( 22 °F), (at or below 30 °C
( 22 °F) in colder climates)
and boil protection to 128 °C
(262 °F). Periodic replacement
of engine coolant is needed to
replenish the anticorrosion
additives that wear out with use.
Engine coolant has become dark
in color shows that it needs to
be changed.
Use only the recommended
coolant. See Recommended
Fluids and Lubricants 0 289,
Do not use methanol-base
antifreeze, alcohol or plain water
alone in your vehicle at any time.
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