Chevrolet 2003 Impala Owner's Manual page 286

A,, electr,, engine cooling fan under the , , , o d
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 recovery tank is boiling,
don't do anything else until it cools down. The vehicle
should be parked on a level surface.
The coolant level should
be at or above the COLD
mark on the coolant
recovery tank.
To check the coolant level, look for the COLD mark on
the side of the coolant recovery tank that faces the
engine. If the coolant level is not at or above the COLD
mark, If it isn't, you may have a leak at the pressure
cap or in the radiator hoses, heater hoses, radiator,
water pump or somewhere else
i n
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 ron the engine if there is a
!eak.
!f 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, with the engine on, check
to see if the electric engine cooling fans are running.
If the engine is overheating, both fans should be
running. If they aren't, your vehicle needs service.
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