1997 Chevrolet Monte Carlo Owner's Manual - Page 236

NOTICE: When adding coolant, it is important thatyou use only DEX-COOL@(silicate-free) coolant. If coolant other thanDEX-COOL is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolantwill require change sooner at 30,000 miles(50 000 km) or 24 months, the whichever occurs first. Damage caused by use of coolant other thanDEX-COOL@ is not covered by your new vehicle warranty. What to Use Use a mixture of one-half clean water (preferably distilled) and one-half DEX-COOL@coolant which won't damage aluminum parts. If you use this mixture, you don't need to add anything else. -- Adding only plain water to your cooling system can be dangerous.Plain water, or some other liquid like alcohol, can boil before proper the coolant mix will. Your vehicle'scoolant warning system isset for the proper coolant mix. With plain water or the wrong mix,your engine could get toohot but you wouldn't get overheat the warning. Your engine couldcatch fire and you or others could beburned. Use a 50/50 mix of clean water and DEX-COOL@ coolant.