GM Service Manual Online
For 1990-2009 cars only

Newly developed engine coolant DEX-COOLâ„¢ was developed to last for 241 350 km (150,000 miles) or 5 years, whichever occurs first. Follow the instructions in Cooling System Draining and Filling . Ensure that only DEX-COOLâ„¢ is added when coolant is added or changed.

A 50/50 mixture of DEX-COOLâ„¢ and clean, drinkable water provides the following conditions:

    â€¢ Freezing protection to -37°C (-34°F)
    â€¢ Boiling protection to 129°C (265°F)
    â€¢ Rust and corrosion protection
    â€¢ Helps keep the proper engine temperature
    â€¢ Allows the warning lights and the gauges to operate as designed