I think his point was that a heavily modded tune was showing a stock CVN...
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I don't know this first hand, But a very good friend of mine that works at a Chevrolet dealer that is performance friendly, has never been able to tell if a truck has been programed, even with a hand help programmer. I know that this dealership has warranted a few transmissions and transfer cases, that were blown because of modifications. This dealer does not even care if you have a lift kit installed with oversized tires
I have sold to this dealer and they have installed quite a few finger stick / blocker plate combos.
current solution right now is the fry your ecm and tow truck in for service....yes, no?
I guess install a pre-computer controler, like Edge etc...., will beat that system......
Pat, the LMM CVN system is a little more complex. The LLY does use a simple adding checksum system, not CRC, I think it is just reporting the adding checksum value to the TechII. Having said that, I thought it would change!
I know what you mean on fooling the ECM to just send back a known value, however, that means that we would need to know the CVN for EVERY segment GM ever released for the LMM and store them in the ECM somewhere, too hard.
Did you get my Email on this BTW?
Cheers,
Ross
My head hurts just thinking about that process :)
Without saying too much we've made some great progress with Bosch ECM's over the last few weeks. Once we get our full flashing working for these ECM's we will probably be able to offer a 'reset ECM' option. :grin:
Cheers,
Ross
Probably not TCM.... GPCM would be my guess.