radio turns on by itself

[Hummer eh!]

radio has been turning on by itself when vehicle is off. and the new glitch now is that the alarm is turning itself on, luckily so far it's been during the day and not at night. looked around the net and have tried multiple ideas. i did find that my cargo door sensor is broken. i'm hoping that is what's causing all of my electrical issues. gonna call the dealership to see if i can pick one up tomorrow. in the meantime, would it be okay to disconnect the rear sensor????