Cutlass V6-191 3.1L VIN M SFI (1998)
Coolant: Description and Operation
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:
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Give freezing protection down to -37°C (-34°F).
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Give boiling protection up to 129°C (260°F).
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Allow the sensors and switches to operate as designed.
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Protect against rust and corrosion.
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Help keep the proper engine temperature.
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Let the warning lights and gauges work correctly.
