Hey Kickstand, thanks for all the useful info. I too am especially puzzled by the radio thing. Of course, I don't get the radio operation in my wife-s 2019 GMC Terrain either! I did install a disconnect at the batteries. And you are right about the location of the house batteries. I too must have had a moment of clarity when I removed the batteries last fall before storage, as I took a few pics and stuck masking tape labels on all the connections. I do think the disconnect switch will solve my dilemma.
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