I have a 2012 Malibu LTZ v6. My car temp gauge is fluctuating. It will be under the half way mark then go up to the half way mark the drop under it. I was doing some troubleshooting its leaking. I just had thermostat change. What i do seem to notice that my fan will come on when it gets to that half way mark and then the temp drops down. When my a/c is on the fan blows high and when i turn off the a/c the fans turn off and then it start fluctuating And when i turn off the car or have it on the on position but the car is not on the fans doesn’t turn on. So I’m wondering is there something up my coolant temprature sensors of do i have a bad fuse. I’m at a losss. The car is not overheating it just bugging that it not holding stead.