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).

GM Goodwrench DEX-COOL(TM) was developed in order to last for 240,000 km (150,00 miles) or 5 years, whichever occurs first. Follow the instructions in Draining and Filling Cooling System. Use only GM Goodwrench DEX-COOL(TM) or HAVOLINE(R) DEX-COOL(TM) when adding or changing the coolant.
A 50/50 mixture of ethylene glycol DEX-COOL(TM) 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.