2003 Buick LeSabre Owner's Manual - Page 283

How to Add Coolant to the Coolant Recovery Tank Ad l g lyplain l.._.ter toyourcooling system can be dangerous. Plain water, or some other liquid such as alcohol, can boil before the proper coolant mixture will. Your vehicle's coolant warning system is set for the proper coolant mixture. With plain water or the wrong mixture, your engine could get too 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 mixture of clean, drinkable water and DEX COOL@coolant. If you haven't found a problem yet, but the coolant level isn't at the FULL COLD mark, add a 50/50 mixture of clean, drinkable waterand DEX-COOL@ engine coolant at the coolant recovery tank. See Engine Coolant on page5-24 for more information. 1 Notice: In cold weather, water can freeze and crack the engine, radiator, heater core and other parts. Use the recommended coolant and the proper coolant mixture. 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. I When the coolant in the coolant recovery tank is at the FULL COLD mark, start your vehicle. 5-32