Engine hot/AC off

So my Pontiac torrent has had this engine hot/ac off since I have this vehicle. I have replaced the thermostat, the temperature control sensor on the block several times, I have had the radiator flushed , and currently on my third dash /cluster , replace wiring harness. There is no over heating , no oil in my radiator fluid, or radiator fluid in my oil. My temp gauge works rarely why I have so many replaced parts. Still same issue. I forgot I even had the map and PCM replaced. Only code I throw is a EVAP however I have noticed that when my gas gauge stops working properly that's when my temp gauge shuts down both fans come on and stay on. I don't lose power to car . Had the temp ran on the motor all in the good!!! Please help I'm currently trying to put in a ecm