1996 Pontiac Grand Am Owner's Manual - Page 247

A CAUTION: Turning the surge tank pressure cap when the engine and radiator are canallow steam and hot scalding liquids to blow out and burn badly. you Never turn the surge tank pressure cap even a little when the engine and radiator are hot. Adding Coolant If you need more coolant, add the proper mix the at surge tank, but only when the engine cool. is You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol, and it will burn if the engine parts are .hot When your engine is cold, the coolant level should be at enough. Don't spillcoolant on a hot engine. the FULLCOLD mark, or a little higher. ~~ -- -- I A CAUTION: If this light comes on, means you're low on engine When replacing the pressure cap, make sure it is tight. coolant. See "LOW coolant Warning Light" in the Index.