2003 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 411

Coolant Surge Tank Pressure Cap See Engine Compartment Overview on page 5-12for more information on location. Engine Overheating You will find a coolant temperature gage on your vehicle's instrument panel. See Engine Coolant Temperature Gage on page 3-42. In addition, you will find a LOW COOLANT LEVEL, ENGINE OVERHEATED and a REDUCED ENGINE POWER message in the Driver Information Center on the instrumentpanel. See Driver Information Center (DIC) on page 3-50. Overheated Engine Protection Operating Mode (V8 Engines Only) The coolant surge tank pressure cap be must installed on the coolant surge tank. fully If an overheated engine condition exists and the REDUCED ENGINE-POWER message is displayed, arl overheat protection mode which alternates firing groups of cylinders helps engine prevent damage. In this mode, you will notice a loss in power and engine performance. This operatingmode allows yourvehicle 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 engine damage, allow the engine to cool before attemptingrepair. any The engine oil will be severely degraded. Repair the cause of coolant loss, change theoil and reset the oil life system.See "Engine Oil" in the Index. Notice: Your pressurecap is apressure-typecap and must be tightly installed to prevent coolant loss andpossibleenginedamagefromoverheating. See "Capacities Specifications" more and for information. 5-36