Engine coolant gauge
Perhaps the thermostat is stuck open.
After driving for about 30 minutes, use a laser type thermometer and get a temperature reading at the thermostat housing. It should be right around 195°F. If it's considerably below 195°F thermostat is definitely stuck open. If your temperature reading is below 100°F the gauge on the dash won't move. HTH. -Jim
I have a 2012 Cruze, with the same issues.. I had a "ac off due to high engine temp" flash on the dash and it stopped reading the engine temp all together. I reset it with a obd reader and it started working again. I've recently changed the coolant temp sensor and thermostat 2x . It use to run 210* now it won't get over 179* doesn't blow the same heat it use to. I GAVE UP .. put cardboard in the radiator, Just make sure you don't block off the condensers!!
Change the thermostat and the coolant temp sensors...$ 200.00
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