Coolant Description

This vehicle was manufactured with GM Goodwrench DEX-COOL. GM Goodwrench DEX-COOL was developed to last for 240,000 km (150,000 mi) or 5 years, whichever occurs first. Make sure only GM Goodwrench DEX-COOL (orange-colored, silicate-free) is used when coolant is added or changed. Follow the instructions in Draining/Filling Cooling System.

NOTICE: Pure coolant 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%, as the freeze level rises rapidly after this point. Pure coolant will freeze at -22°C (-8°F).

A 50/50 mixture of ethylene glycol (GM Goodwrench 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 (260°F).
^ Allow the sensors and switches to operate as designed.
^ Protect against rust and corrosion.
^ Help keep the proper engine temperature.
^ Let the warning lights and gauges work correctly.