2004 GMC Savana Van Owner's Manual - Page 274

Cooling System When you decide it's safe to lift the hood, here's what you'll see: When the engine is cold, the coolant level should be at or above the COLD FILL 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 in the cooling system. {CAUTION: A. Radiator Pressure Cap B. Coolant Recovery Tank C. Engine Cooling Fan(s) If the coolant inside the coolant recovery tank is boiling, don't do anything else until it cools down. Heater and radiator hoses, and other engine parts, can be very hot. Do not touch them. If you do, you can be burned. Do not run the engine if there is a leak. If 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. 5-28