2003 Oldsmobile Aurora Owner's Manual - Page 261

Coolant Surge Tank Pressure Cap The cooling system pressure cap is located on the surge tank. Notice: Your cooling system pressure cap is a pressure-type cap and must be tightly installed to prevent coolant loss and possible engine damage from overheating. Overheated Engine Protection Operating Mode If an overheated engine condition exists and the message HOT STOP ENGINE is displayed, an overheat protection mode which alternates firing groups of cylinders helps prevent engine damage. 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. Driving extended miles (km) and/or towing a trailer in the overheat protection mode should be avoided. Notice: After driving in the overheated engine protection operating mode, to avoid enginedamage, allow the engine to cool before attempting any repair. The engine oil will be severely degraded. Repair the cause of coolantloss, change the oil and reset the oil life system. See "Engine Oil" in the Index. Engine Overheating You will find a coolant temperature gage on your vehicle's instrument panel. Your Driver Information Center (DIC) will also display messages about engine overheating. See Engine Coolant Temperature Gage on page 3-38. 5-28