1993 Cadillac DeVille Owner's Manual - Page 254

A CAUTION: I 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 enough. Don't spill coolant on a hot engine. When the coolant the coolant recovery tank is at or above near "FULL in COLD," start your vehicle. If the overheat warning continues, there's one more thing you can try. You can add the proper coolant directly to the radiator, but be sure mix the cooling systemis cool before you do it. 241