NOTICE: When adding coolant, it is important that you use GM Goodwrench DEX-COOL® or HAVOLINE® DEX-COOL® coolant. If Coolant other than DEX-COOL® or HAVOLINE® DEX-COOL® is added to the system the engine coolant will require change sooner; at 50 000 km (30,000 mi) or 24 months.
This vehicle has a newly developed engine coolant. GM Goodwrench® DEX-COOL® was developed to last for 240 000 km (150,000 mi) or 5 years, whichever occurs first. Follow the instructions in Draining and Filling Cooling System. Ensure only GM Goodwrench® DEX-COOL® (silicate-free) or Havoline® DEX-COOL® is used when coolant is added or changed.
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).
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 130°C (262°F). |
| • | Protect against rust and corrosion. |
| • | Help keep the proper engine temperature. |
| • | Let the warning lights and gauges work correctly. |
