6-27Engine CoolantThe cooling system in your vehicle is filled withDEX- COOL engine coolant. This coolant is designedto remain in your vehicle for 5 years or 150,000 miles(240 000 km), whichever occurs first, if you add onlyDEX- COOL extended life coolant.The following explains your cooling system and howto add coolant when it is low. If you have a problemwith engine overheating, see “Engine Overheating” inthe Index.A 50/50 mixture of clean, drinkable water andDEX- COOL coolant will: Give freezing protection down to - 34F (- 37C). Give boiling protection up to 265F (129C). Protect against rust and corrosion. Help keep the proper engine temperature. Let the warning lights and gages work asthey should.NOTICE:When adding coolant, it is important that you useonly DEX- COOL (silicate- free) coolant.If coolant other than DEX- COOL is added to thesystem, premature engine, heater core orradiator corrosion may result. In addition, theengine coolant will require change sooner -- at30,000 miles (50 000 km) or 24 months,whichever occurs first. Damage caused by the useof coolant other than DEX- COOL is notcovered by your new vehicle warranty.