I have a 2022 Sierra 3500HD, and the 120V outlet seems to work intermittently. My main use is to charge my laptop. I do keep an electric razor for when I need to look presentable, and get rid of the 5 O’clock shadow. It has run it before, but isn’t working now. I’ve read about the engine running, and have wondered if the battery charging has to be below a certain level, such as not right after a start.
I’ve got a 2022 3500 and it does the same thing. The crank is slightly extended for a cold start in low temps. It seems to cold start with normal cranking when the weather is warm.
I have a base model 3500, and there is a setting to pair bluetooth. It seems like to bring up apps like Maps, or Youtube Music, XM… that it only works with the cable. Otherwise I need to open the app and then I can skip songs and such with bluetooth. I’ve also found that if I enable bluetooth on my phone and connect the cable that it sometimes doesn’t work right.