“Will they be getting warrants to get Onstar to interfere? If not, unconstitutional.”
The current plan, as described, is that they will use it only AFTER the car is reported stolen, so whoever has it, is in process of committing a crime, so the police has the right to stop them.
BUT... the implications for other uses is obvious.
Also, I bet most car chases do not involve stolen cars.
Would be interesting to use in the case of an impaired driver...