1993 Pontiac Grand Prix Owner's Manual - Page 196

A The coolant level should be or above at the COLD mark. If it isn't, you may have a leak in the radiator hoses, heater hoses, radiator, water pump or somewhere else in cooling system. the ~ CAUTION A I Heater and radiator hoses, and other engine parts, can be very hot. Don't touch them. If you do, you can be burned. Don'$ run the engine if there is a leak. If you run the engine, it could lose al coolant. That could cause l an engine fire, and you could be burned. Get any leak fixed before vou drive the vehicle. If there seems to be no leak, checkto see if the electric enginefan is running. If the engine is overheating, the f a n should be running. If it isn't, your vehicle needs service. How to Add Coolant to the Coolant Recovery Tank: If you haven't found a problem yet, but the coolant levelisn't at or above COLD, add a 50/50 mixture of clean water (preferably distilled) and a proper antifreeze at thecoolant recovery tank. (See the Index under Engine Coolant for more information about the proper coolant mix.) Adding only plain water to your cooling systemcan be dangerous. Plain water, or some other liquid like alcohol,can boil before the proper coolant mix will. Your vehicle's coolant warning system is set for the proper coolant mix. With plainwater or the wrong mix, your engine could gettoo hot but you wouldn't get the overheat warning. Your engine could catch fire and you or others could be burned. Use a 50/50 mix of clean water and a proper antifreeze. I cold weather, water can freed crack the engine, radiatnr ater core and other parts.