CHEVROLET 1999 Cavalier - Manual (Page 218)

yellow blue
5-12
If the coolant inside the coolant surge tank is boiling,
don’t do anything else until it cools down.
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.
CAUTION:
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.