Cooling System - Chevrolet T-Series Owner's Manual

Cooling System

CAUTION:
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If your vehicle has air conditioning, the
auxiliary electric fan under the hood can
start up even when the engine is not
running and can injure you. Keep hands,
clothing and tools away from any
underhood electric fan.
If the coolant inside the coolant surge tank is
boiling, do not do anything else until it cools down.
The vehicle should be parked on a level surface.
When the engine is cold, the coolant level
should be at the COLD FULL mark. If it is not, you
may have a leak at the pressure cap or in the
radiator hoses, heater hoses, radiator, water pump,
or somewhere else in the cooling system.
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CAUTION:
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Heater and radiator hoses, and other
engine parts, can be very hot. Do not
touch them. If you do, you can be burned.
Do not 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.
If there seems to be no leak, start the engine
again. The engine cooling fan speed should
increase when idle speed is doubled by pushing
the accelerator pedal down. If it does not,
your vehicle needs service. Turn off the engine.