I would say that it sounds like a sensor problem even though the dome light comes on when you open the door seeing as the dome light also does not work when the radio problem is happening. Definitely a weird issue though.
I was excited this morning when the radio said there was an update available, but after the update the problem persists. Next week I have an appointment at the dealership to have it looked at, hopefully they can figure it out without having to tear apart my two month old vehicle.Mine did this early on until the radio asked for an update. It has not done it since
Thanks for the info Dave, I am hoping this thread helps not only us, but others in the future. I will post any further changes with my Blazer, especially after my appointment at the dealer. I would appreciate you posting anything you can as well.My 2020 Blazer just started doing the same thing this week. I'm assuming its a software/update issue vs hardware since we both have the same symptoms during the same period of time. I confirm that the radio do shut off just not when you open door like in the past.
Hope that it doesn't act up anymore.Mine did it just this morning. Twice. Then on the 3rd time it didn't do it. Guess I need to remember to manually turn the radio off before getting out.
Ok, this is getting ridiculous. Now my Blazer is back to no dome light & radio stays on.Not sure if mine did an update today or not, but the problem has changed. Now the vehicle thinks the door is open all the time, even driving, dome lights on & door indicator on dash.
At least with the dome light switch turned off, the radio shuts off as soon as I shut off the vehicle.