Cars with OnStar s built-in technology will begin having their where-abouts monitored in December, even if their owners opt-out of the service. The company claims to reserve the right to share location information with law enforcement, public safety officials, credit card processors and other third parties. The move opens a litany of privacy questions revolving around how this information will be disseminated. OnStar, a subsidiary of General Motors, has long collected metrics about its users car: How often the vehicle is refueled, tire pressure, and odometer and oil readings.
Source: https://threatpost.com/onstar-track-speed-location-cars-even-after-opting-out-092111/75677/