Coolant Description

NOTICE: Antifreeze can be added to raise the boiling point of the coolant, but too much will affect the freezing point. Do not use a solution stronger than 70 percent antifreeze, as the freeze level rises rapidly after this point. Pure antifreeze will freeze at -22°C (-8°F).

This vehicle has a newly developed engine coolant. GM Goodwrench DEX-COOL was developed in order to last for 240,000 km (150,000 miles) or 5 years, whichever occurs first. Follow the instructions in Draining and Filling Cooling System. Use only GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL when adding or changing the coolant.
A 50/50 mixture of ethylene glycol DEX-COOL and water will provide the following protection:
^ Give freezing protection down to -37°C (-34°F)
^ Give boiling protection up to 129°C (265°F)
^ Protect against rust and corrosion
^ Help keep the proper engine temperature
^ Let the warning lights and gauges work as they should.