Radio has sound when key is out and door open

I had this happen in my Chevrolet Malibu once. I was at a sporting event, and had some down time. I sat in my passenger side with the door open since it was facing downhill. In my case, you can sit in the passenger side, and turn the ignition to get radio power/on. It will stay on, even after removing the key. It seems to only respond to opening and then shutting the driver side door (to shut it off). Passenger door open/closed does nothing.
That is my guess. I do not fix cars, I just pay for them. Try that next time? Good luck.

Hey,

This sounds like it is going to be a problem with the gateway ECU which controls the power to the radio.

Here is a wiring diagram so you can remove the radio and do some testing to see if the power shuts down from the ECU.

Also, check the fuses in the system the wiring diagram shows which ones to check.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Please run some tests and get back to us so we can continue helping you.

Best, Ken