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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling >> Description and Operation >> Cooling System Description and Operation >> Engine Coolant Indicators >> Engine Coolant Hot

Engine Coolant Hot

The instrument panel cluster (IPC) illuminates the ENGINE COOLANT HOT indicator in the message center when the IPC determines that the coolant temperature is greater than 121°C (251°F). The IPC receives a class 2 message from the powertrain control module (PCM) indicating the coolant temperature.