Judd Armstrong

So I have a 2014 GMC Sierra 1500 when I crank it up the fans come on immediately at really high speeds while the fans are running the ac will not blow cold and my temp gauge will not work I’ve replaced the temp sensor and I’ve replaced the ac pressure switch will the truck is turned off the fans will continue to run but I can unhook the battery and they will quit everything will go back to normal sometimes a week sometimes a month before it decides to act up again does anyone have any suggestions