2002 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 336

Engine Overheating You will find a coolant temperature gage on your vehicle's instrument panel. See "Engine Coolant Temperature Gage" in the Index. In addition, you will find a LOW COOLANT, CHECK COOLANT TEMP, ENGINE OVERHEATED and a REDUCED ENGINE POWER message in the message center on the instrument panel. See "Message Center" 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, change the oil and reset the oil life system. Repair the cause of coolant loss and change the oil. See "Engine Oil" in the Index. Overheated Engine Protection Operating Mode (V8 Engines Only) If an overheated engine condition exists and the REDUCED ENGINE POWER message 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. 5-10