Quote:
Originally Posted by SS Matt
This has been gone over a million times. Too many paranoid people out there. OnStar can't, doesn't, and won't look at your tune. Some people shouldn't buy cars if they are that paranoid.
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Not true,
Yes on a common basis the answer would be no but when certain error codes or conditions get flagged then GM looks deeper.
Onstar connects to both the class 1 and 2 ( GMLAN) network and can query any module (controller) just as any OBD scanner or Tech-II can.
I have had customers who got calls from GM asking why they were doing high speeds to asking why torque values were higher then stock values.
There are hundreds of parameters and any one can be checked, even my wireless OBD scanner can do it but it is simple to know GM can look for any DTC codes which means it also can request any other PID value which includes all 8 CVN code segment IDs, when PCM was flashed to how many drive cycles DTCs existed or were reset.