Coolant Description

COOLANT DESCRIPTION
This vehicle has a newly developed engine coolant. GM Goodwrench DEX-COOL (R) was developed to last from 240,000 km (150,000 mi) or 5 years, whichever occurs first. Follow the instruction in Draining and Filling Coolin2 System. Make sure only GM Goodwrench DEX-COOL (R) (silicate-free) or Havoline DEX-COOL (R) is used when coolant is added or changed.
A 50/50 mixture of DEX-COOL (R) and clean drinkable water will provide the following protection:

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

^ Give freezing protection down to-37°C (-34°F).
^ Give boiling protection up to 129°C (260°F).
^ Protect against rust and corrosion.
^ Help maintain the proper engine temperature
^ Let the warning lights and gauges operate correctly.