Did you ever find out the problem with the temp gauge? My Cruze is having the same problem, sometimes when I crank it up cold start the fans stay on high and never cut off and other times it works fine, usually just have to turn the car off and back on again to get the high speed fan mode to stop. I've gone through two water pumps and feel as if the temp gauge is lying to me as well cause it's only ever gone to the hot side once it was actually overheating. Am going to replace the tensioner and another water pump and hopefully that fixes the problems with the water pump going out, thankfully got a brother that works at O'Reilly's and gets half off parts and convinced me on the lifetime warranty pump last second before buying it. Just tired of replacing and working on this **** car all the time as I use it to doordash full time. Worked great for a week straight after the new pump was put on and started chirping again tonight and I checked the pump and sure enough seen coolant seepage around the gasket and block and coolant resovoir was bubbling/boiling so I know air got in it again. SMH this cars going to get me evicted from my house if this doesn't solve the problem this time cause I can't. Afford to keep paying for parts and wasting precious dashing time working on it day after day. Seems everytime I can set aside some money to save for once the **** things gives me another problem. Swear I'll never purchase a brand new car again lol crappy plastic cars now days 😡😡😡😤😤😤