Talk to someone at one of the Onstar suppliers. How about LG, Conti, or Motorola and see if it the onstar telecommunication unit has the ability to pull the CVN's


An E38 from a Camaro and a E38 from a Truck with the same service number 1 has a the flash counter and the other has no posible wat of counting how many times it has been flashed.

 

Some vehicles are harder to detect altered calibrations than others.

I see customers all of the time trying to pull the wool over the dealerships eyes. It is not the way to do it.

If you have a dealership that does not understand add on performance parts and blames it for a failed component then you need a new dealership.

I worked at GM dealers for over 12 years and I am a GM World Class trained tech. I have completed over 500 GM training courses.

The last Cadillac dealer I worked at we did a lot of work on modified cars. We had a few techs that didn't want to work on them and would cause a big stink. I had a few inner city customers that would come in causing a problem in the service department yelling and I would just email GM with the modified calibration CVN's. This 100% goes around the service managers back. The most part if the mod's didn't cause the failure and you didn't come in yelling we fixed it. The only thing important was Customer Satifaction and at any cost.

 

Onstar is a whole different ball game. It certainly can be used to pull CVNs through the OBD-II interface but I haven't actually seen it used in such a manner to track vehicle history. The data it uploads as part of the monthly analysis hasn't historically documented this.

 

If it is flashed back with the exact tune that came with it, the CVN numbers will match up, so it will pass that portion of their warranty validation procedure. Short answer is, yes it will be fine.

Never said it couldn't pull CVNs, but said that they don't use it for that purpose, and I honestly don't see that type of thing starting anytime soon either. They aren't going to start pulling millions of vehicles calibration numbers to see if they can catch a few guys modding their cars. They are being proactive with the new vehicle platforms from here on out, which will pretty much protect them from a warranty standpoint.

My Onstar gets the fuse pulled anyway, since GM has acknowledged that they still "communicate" with some vehicles, even after your sevice has expired. I don't like the idea of that anymore than I like the idea of Verizon Wireless selling my website history, location, and other info to outside companies.