2004 Saturn L300 Owner's Manual - Page 271

Checking Coolant The surge tank is located on the driver"s side of the engine compartment. See Engine Compartment Overview on page 5-12 for more information on location. {CAUTION: Turning the surge tank pressure cap when the engine and radiator are hot can allow steam and scalding liquids to blow out and burn you badly. Never turn the surge tank pressure cap - even a little - when the engine and radiator are hot. The vehicle must be on a level surface. When your engine is cold, the coolant level should be at the Cold line (surge tank seam). When your engine is warm, the level should be at the Cold line or a little higher. If the low coolant light comes on and stays on, it means you're low on engine coolant. See Low Coolant Warning Light on page 3-33. 5-25