2005 Buick Century Owner's Manual - Page 237

Cooling System When it is safe to lift the hood, this is what you will see: {CAUTION: An electric engine cooling fan under the hood 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, do not do anything else until it cools down. The vehicle should be parked on a level surface. When the engine is cold, the coolant level should be at or above the COLD mark on the coolant recovery tank. If it is not, there may be a leak at the pressure cap or in the radiator hoses, heater hoses, radiator, water pump, or somewhere else in the cooling system. A. Coolant Recovery Tank B. Electric Engine Cooling Fans C. Radiator Pressure Cap 5-27