Unfortunately I can add my name to this list. Yesterday pulled my truck out of the garage to do a big spring cleaning. A couple hours later pulled it back in, it stumbled a little pulling it in which I thought was odd. About 9pm I went to move it out again so I could get to something I needed in the garage and it was dead. Only thing that would work was lock/unlock on the key fob. Hooked it up to battery tender/ charger all night, and it still wasn’t showing it charged this morning, but it did start. It had a bunch of codes, check engine, check brakes, etc... so I drove it to my dealer. It ran funny on the way, lag/ hesitation off the line, brake pedal clicked every time I presses it, shifted funny, which my truck hasn’t done any of these previously. To the dealers credit, without any appointment they took in my truck and gave me a loaner Tahoe. We’ll see what they come back with.
Also, it’s a 2020 Rst with 750 miles.