I am having an issue where after my car is off for a while the radio will turn back on and stay on until the battery is drained. I have had a large Chevy dealership along with Best Buy's automotive team (the ones who installed my new radio) and no one can seem to figure out what would be causing this.
The radio always turns off after I turn off the engine and open door, so it does shut off correctly at first, but some days I will come back out to either a dead car or the radio being on (I can look into the car window and see it lit up).
Both places have done full electrical charging system checks and everything has been perfect, but no one can seem to figure out why my radio keeps turning itself back on.
I am looking for some things I can try to do or bring up when I see the mechanic(s) again this week (as I am not much of a car person).
EDIT: Best Buy is going to swap out a module this Thursday to see if that clears up the issue. They think that maybe another component could be triggering it to turn on, such as On Star.
EDIT 2 (August 1st): Removed the module, radio still stays on AND even if the screen is removed over night my vehicle's battery is still being drained to the point where it will not turn on. I am guessing the module is needed to turn off some other components. Going to have mechanic re-add the module and I will attempt to just remove my screen each night to see if that solution works.
My solution was to take off the screen at night and call it good. However my car is still dying randomly, one morning it starts fine, the next morning it is dead. I have had 4 places now verify my charging system, startup, and battery. All results are perfect.
I do notice when I return to my car sometimes that I can see the P (park) light lit up on the dashboard, I am wondering if something is triggering my electronics to turn back on (might be why the radio is acting up too). I also have noticed that sometimes when I open the car door (after it was off/locked) the ringer starts non-stop (the one that usually indicates that your key is still in the ignition or that your lights are on).
I did some googling (because I know squat about cars) and it sounds like it could be an ignition switch issue with it turning back to acc? Usually in those scenarios though people say nothing turns off right away, whereas in my car my electronics usually turn off but then turn back on later.
Any new guidance appreciated!!
Final Update (5/27/18)
It ended up being the ignition switch. It was somehow turning back into ACC (accessory) mode. I replaced it several months ago and no longer have this issue.