Chevrolet 1995 Cavalier Owner's Manual page 191

If the coolant inside the coolant surge tank is boiling,
don't do anything else until it cools down.
I
The coolant level should be at the FULL COLD mark. 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.
I
NOTICE:
I
Engine damage from running your engine
without coolant isn't covered by your warranty.
If there seems
t o
be no leak, with the engine on, check to
see
if
the electric engine fm is running. If the engine is
overheating, the
fan
should
be
running. If
it isn't, your
vehicle needs service.
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