1997 Chevrolet Blazer Owner's Manual - Page 233

How to Add Coolant to the Coolant Recovery Tank I f you haven't found a problem yet, but the coolant level isn't at the ADD mark, add a SO/SO mixture of clenrz w t e r (preferably distilled) and DEX-COOL" (silicate-free) antifreeze at the coolant recovery tank. (See "Engine Coolant" i n the Index for more information.) NOTICE: In cold weather, water can freeze crack the and engine, radiator, heater core and other parts. Use the recommended coolant and the proper coolant mix. A CAUTION: Adding only plain 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 mix. With system is set for the proper coolant plain water or the wrong mix, your engine could get too hot but >'ou wouldn't get the overheat warning. k'our engine could catch fire andyou or others could he hurned. Use a 50/50 mix of clean water and DKX-CWOL" coolant. 5-16