this post was submitted on 11 Oct 2024
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That's not me, I mostly searched forums and whatnot. My cars are all old enough that they don't have this nonsense, and while I am handy with cars (do all my own maintenance), I'm not a mechanic, so I don't have direct experience.
That said, at recent-ish Chevy cars w/ OnStar seem to have separate power and board for the wwan. I've watched a couple of these videos, and they seem pretty legit.
And with a quick check on Mazda, It seems you have two options:
Again, I haven't actually done this for any car, but it's definitely something I'm going to be looking at before deciding on a make and model because I intend to remove whatever tracking BS they put in.
Maybe I'm missing something here, but OnStar is a 3rd party service, so it makes sense they would have a bolt-on device that can be removed without too much concern for the rest of the car's functionality.
Also, isn't a TCU something that controls a car's drivetrain and transmission?
Edit: nevermind, just searched and found telematic control unit. Interesting, thanks for the info, I might look into this more if I have more time later.
TCM is the thing that controls the transmission