2003 Chevrolet Impala Owner's Manual - Page 286

A,, electr,, engine cooling fan under the,, d o can start up even when the engine not is running and can injure you. Keep hands, clothing and tools away from any underhood electric fan. To check the coolant level, look for the COLD mark on the side of the coolant recovery tank that faces the engine. If the coolant level is not at or above the COLD mark, If it isn't, you may have a leak at the pressure cap or in the radiator hoses, heater hoses, radiator, water pump or somewhere else i n the cooling system. If the coolant inside the coolant recovery tank is boiling, don't do anything else until it cools down. The vehicle should be parked on a level surface. The coolant level should be at or above the COLD mark on the coolant recovery tank. Heater and radiator hoses, and other engine parts, can be very hot. Don't touch them. If you do, you can be burned. Don't ron the engine if there is a !eak. !f you run the engine, it could lose all coolant. That could cause an engine fire, and you could be burned. Get any leak fixed before you drive the vehicle. If there seems to be no leak, with the engine on, check to see if the electric engine cooling fans are running. If the engine is overheating, both fans should be running. If they aren't, your vehicle needs service. 5-33