2004 Saturn Ion Owner's Manual - Page 258
2004 Saturn Ion Manual
Page 258 highlights
Checking Coolant {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 near the cold fill line. When your engine is warm, the level should be at the cold fill line or a little higher. 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. If the COOLANT warning message comes on and stays on, it means you're low on engine coolant. See Low Coolant Level Warning Message on page 3-43. 5-28
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