OnStar isn’t GPS ,, it is simply old school high powered analog cellular service wrapped up in a fancy package... to get your position they would triangulate with cell towers... for joe six-pack sheriff to get that info would require a search warrant... there is no memory in the OnStar system that would retain your movements although it could be done at the provider level.
So Far so good...
BUT.... The FBI (and others) can listen in on your conversations through the cell connection without turning on the red “system active” indicator light... and they can do that in any GM car that has the OnStar equipment installed ; OnStars brains are built into the engine computer, if OnStar is available on your car and you didn’t order it BUT you have a radio with the little hidden microphone THEY CAN LISTEN IN!
Yet another reason NOT to buy a GM vehicle. And I won’t.
YIKES!
Just to clearify here. Onstar DOES have GPS. Onstar was originally Analog, But all Current systems are Digital and older systems in use have been upgraded to digital as analog is no longer supported. (I did several of these upgrades myself).Onstar may very well have memory of your locations as they can track a stolen car.On stars brains are not in the ECM(engine control module)but in the Onstar module itself.I beleive they probably could listen in on an inactive onstar system if they so desired as 911 capability is usually available on inactive cell phones.