1997 Pontiac Grand Prix Owner's Manual - Page 251

NOTICE: Engine damage from running your engine without coolant isn't coveredby your warranty. _I If there seems to beno leak, with the engine on, check to If see if the electric engine fans are running. the engine is overheating and the key is on, both fans should be running. If they aren'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 level isn't at the COLD mark, add a 50/50 mixture of clean water (preferably distilled) and DEX-COOL antifreeze at the coolantrecovery tank. (See "Engine Coolant" in the Index for more information.) Adding onlyplain water to your cooling system can be dangerous. Plain water, or some other liquid like alcohol,can boil before the proper coolant mix will. Your vehicle's coolant warning system isset for the proper coolant mix. With plain water or the wrong mix,your engine could get too but you wouldn't getthe hot overheat warning. Your engine couldcatch fire and you or others could beburned. Use a 50/50 mix of clean water and DEX-COOL antifreeze. I NOTICE: In cold weather,water can freeze and crack the engine, radiator, heater core and otherparts. Use the recommended coolant and the proper coolant mix.