1994 Buick Skylark Owner's Manual - Page 191

If the coolant inside the coolant surge tank is boiling, don't do anything else until it cools down. .The coolant level should beat or above "FULL COLD." If it a isn't, you may have leak in the radiator hoses, heater hoses, radiator, water pump or somewhere else in the cooling system. I NOTICE: Engine damagefrom running your engine without coolant isn't covered by your warranty. If there seems to be no leak, check toifsee electric the engine fanis running. If the engine is overheating, the fan should be running. If it isn't, your vehicle needs service.