2001 Chevrolet Impala Owner's Manual - Page 263

Towing Your Vehicle Consult your dealer or a professional towing service if you need to have your vehicle towed. See "Roadside Assistance" and "Recreational Vehicle Towing" 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. Engine Overheating You will find a coolant temperature gage and a warning light about a hot engine on your instrument panel cluster. See "Engine Coolant Temperature Gage" and "Hot Coolant Temperature Message" in the Index. You also have a low coolant light on your instrument panel cluster. See "Low Coolant Level Message" 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. 5-9