This vehicle has a newly developed engine coolant. GM Goodwrench® DEX-COOL® was developed to last fro 240 000 km (150,000 mi) or 5 years, whichever occurs first. Follow the instruction in Draining and Filling Cooling System. Make sure only GM Goodwrench® DEX-COOL® (silicate-free) or Havoline® DEX-COOL® is used when coolant is added or changed.

A 50/50 mixture of DEX-COOL® 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).