Buick 1994 Roadmaster Owner's Manual page 204

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If
the coolant inside the coolant surge tank is bailing,
don't do.anything else until it cools down.
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, .
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heater hoses, radiator, water pump or somewhere else in
the cooling system.
I
NOTICE:
The coolant level should be at or above "FULL
COLD."
If it isn't, you may have a leak in the radiator hoses,
I
Engine damage from running your engine
without coolant isn't covered by your warranty.
If there seems to be no leak, check to see if the electric
engine fans are running. If the engine is overheating,
both fans should be running.
If
they aren't, your vehicle
needs service.
202