Yukon XL 2500 2WD V8-6.0L VIN N (2006)
Thermostat: Specifications
Temperature sticks can be used to determine a thermostat's operating range, by rubbing 87°C (188°F) and 97°C (206°F) sticks on the thermostat housing
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1. Use a tempil stick in order to find the opening and the closing temperatures of the coolant thermostat.
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J 24731-188 tempil stick melts at 87°C (188°F). The thermostat should begin to open.
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J 24731-206 tempil stick melts at 97°C (206°F). The thermostat should be fully open.
2. Replace the coolant thermostat if it does not operate properly between this temperature range.
