2001 Buick Century Owner's Manual - Page 226

Engine Overheating You will find a coolant temperature gage and a hot engine warning light on your instrument panel. See "Engine Coolant Temperature Gage" and "Engine Coolant Temperature Warning Light" in the Index. You also have a LOW COOLANT warning light on your instrument panel cluster. See "Low Coolant Warning Light" in the Index. NOTICE: After driving in the overheated engine protection operating mode, to avoid engine damage, allow the engine to cool before attempting any repair. The engine oil will be severely degraded. Repair the cause of coolant loss and change the oil. See "Engine Oil" in the Index. Overheated Engine Protection Operating Mode This emergency operating mode allows your vehicle to be driven to a safe place in an emergency situation. Should an overheated engine condition exist, an overheat protection mode which alternates firing groups of cylinders helps prevent engine damage. In this mode, you will notice a significant loss in power and engine performance. The low coolant light may come on and the temperature gage will indicate an overheat condition exists. Towing a trailer in the overheat protection mode should be avoided. 5-9