Discussion Starter · #1 ·
I have a 2019 GMC Terrain SLT 2.0L. My temp gauge went all the way to the left and was not reading temp and the fan continued to run after the engine was shut off. The research I saw showed a bad ECT (Engine Coolant Temperature Sensor) I took it to Auto Zone and that is what the machine said was wrong. I replaced the sensor and it worked for a DAY!!. When I disconnect the ground to shut the fan off it will work again for a short time. PLEASE help!! What else could it be?