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Home >> Hummer >> 2007 >> H3 L5-3.7L >> Repair and Diagnosis >> Specifications >> Pressure, Vacuum and Temperature Specifications >> Thermostat, Engine Cooling
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Thermostat, Engine Cooling

The thermostat should begin to open at 90°C (194°F).
The thermostat should be fully open at 107°C (225°F).
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