I have a 2012 GMC with a factory alarm. Occasionally when I lock the doors using fob the alarm goes off a little while later for no apparent reason whatsoever. I have read other posts suggesting that maybe the key fob buttons are sticking creating a panic mode. Is there a way to test a fob? What else could it be? Is there a way to desensitize the alarm? Sorry for all the questions, I'm a newbie