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Originally Posted by codyn  yea you can take it off and send it in they will will try to say you had something on there but they can never prove it. had one lmm go in for some work had alot done to it took the tunning off. they said we know something was on it . ok can you show me where? nope fixed it and never said another word. old wise tale  |
We can actually prove of tuner and programmer usage now. Each time you use the tuner to flash a program to your ECM, it changes the Calibration Verification Number. By looking at the CVN's in the vehicle's ECM, and matching it to the CVN's listed from GM programming, we can spot the tuner usage because the tuners and programmers do not use the same CVN as GM. You may think that they can not prove it, but now we can. Unless the tuners and programmers find out how to clone a GM CVN to the ECM and keep their tuning program going as they had it tuned for, dealers can now determine actual tuner and programmer usage and you are no longer safe, unless the tech that works on your vehicle does not know about matching the CVN's to the GM database.