Operation CHARM
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Buick
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2010
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Lucerne V6-3.9L
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Cooling System
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Thermostat
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Specifications
Thermostat: Specifications
The thermostat should begin to open at
87°C (188°F)
The thermostat should be fully open at
97°C (206°F)