2005 Pontiac Grand Am Owner's Manual - Page 231

If you have to add coolant more than four times a year, have your dealer check your cooling system. Notice: If you use the proper coolant, you do not have to add extra inhibitors or additives which claim to improve the system. These can be harmful. {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 hash mark, or a little higher. If the LOW COOLANT light comes on and stays on, it means you are low on engine coolant. Checking Coolant 2.2L L4 ECOTEC™ engine shown, 3400 V6 engine similar The coolant surge tank is located in the engine compartment on the passenger's side of the vehicle. See Engine Compartment Overview on page 5-12 for more information on location. See Low Coolant Warning Light on page 3-30. 5-23