DeVille d Elegance V8-4.6L VIN Y (1998)
Coolant: Description and Operation
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 miles) 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 miles) or 5 years,
whichever occurs first. Follow the instructions 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 ethylene glycol (DEX-COOL) and 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 %, as the freeze level rises rapidly after this point. Pure coolant will freeze at -22°C (-8°F).
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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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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.
