Your behind the times,
EPA/SAE if you want to call it OBD-III or another name requires wireless.
The whole purpose of the requirement nameplates use wireless was multi purpose but one of course is to query PCMs to determine if the vehicle is out of I/M spec an hence the feds have approved using that wireless to query any data.
While car is under full GM warranty it is not spying as it is GM's software in controllers not the car owners and has the right to determine if their property has been hacked.
Feds also have approved 3rd party business to sell services to monitor, test and query via wireless or internet.
One service I worked with charges like $9 and within 1 minute can do the tests and build a report on the internet such as :
http://vehiclemri.com/Reports/Vehicl...mplete+659.pdf
http://vehiclemri.com/
Takes nothing more then a connection to DLC and a internet or wireless path.
Since the feds think this is a helpful service they allow any nameplate for TEST purposes to query whatever they want.
OnStar is legal and being it is on ( Starbus, GMLAN and CAN) is being sent data, it is not spying as controllers are sending the data to other controllers including the OnStar controller.
Heck cars can just be parked at a dealer and automatic wireless using OnStar path query controllers and if updates are seen then auto downloaded and
EPA wants this as it takes out of the hands of techs at smog shops cheating (passing cars that would have failed) by having the auto test process wireless.
Facts do not change the PCM used for the C7 has been used on other nameplates and models, mostly in Europe and no one has been able to succeed in connecting, or faking to be the server so that the PCM ( client) content can be read and modified so no sense in the maybes, could be or waving a magic wand so C7 buyers now should forget any so called performance mods until tuning is possible and that you know those tuners know about VVT, Di, DOD, etc and not be the testpigs for their learning curve.
Until ALL new functions and controllers are understood and if PCM does get hacked at this time I know of no tuner product vendor even starting on this and at the least cannot until the C7 hits streets late summer or early fall and within 2 years GM maybe using a totally different PCM design