2003 Cadillac DeVille Owner's Manual - Page 298

Coolant Surae Tank Pressure Cata v I- Notice: Your pressure cap i a pressure-type s cap and must be tightly installed to prevent coolant loss and possible engine damage from overheating. See "Capacities and Specifications" for more information. Overheated Enaine Protection Operating Mode 4 Engine Overheating You will find an ENGINE COOLANT HOT, IDLE ENGINE message or an ENGINE OVERHEATED, STOP ENGINE message displayed in the Driver Information Center (DIC). You will also hear a chime. There is also an engine temperature warning light and/or gage on the instrument panel cluster. See Engine Coolant Temperature WarningLight on page 3-49 and Engine Coolant TemperatureGage on page 3-50. If an overheated engine condition exists and the message ENGINE OVERHEATED, STOP ENGINE is displayed, an overheat protection mode which alternates firing groups o cylinders helps prevent engine damage. f In this mode, you will notice a loss in power and engine performance. This operating mode allows your vehicle to be driven to a safe place in an emergency; you may drive up to 50 miles (80 km). Driving extended miles (km) and/or towing a trailer in the overheat protection mode should be avoided. Notice: After drivingin the overheated engine protection operating mode, to avoid engine damage, allow the engine to cool before attempting any repai The engine oil will be severely degraded. Repair the cause of coolant loss, change the oil and reset oil the life system.See "Engine Oil" in the Index. 5-27