On-Star: Knows where you've been.

[Alex]

Almost everything we do leave a transaction record. That will continue to be the case and I don't really want to go back to the technology where that won't be the case.

Every transaction record, if stored, will end up being available to government review with warrant/subpoena and I am ok with that. You're free to not buy an On-Star enabled car. If enough people refuse to buy the service because of records that are stored, then On-Star will stop storing the records. I wouldn't support the government requiring On-Star to keep records such as those, but I don't have a problem with the government being able to subpoena them if they exist.