E38 Serial number

[SPi]

I guess my bad in two ways. One, letting my customer supply the ECM, and two, not having my tech check the #'s on both ECM's before in went to the dealer. Although I would think they would do it at the dealer, but I'll take the blame for this.
WHY DO PEOPLE LOCK THEIR TUNES!!! This wasn't some wild one off super secret build, just a stock Maggie making 6psi!!

[gmh308]

Attachment 12765

Thanks Taz this helps, a comprehensive list of ecm service #'s vs OS's would be great.

Thanks

There is a GM centric list somewhere which lists which ECM is used in which MY car/truck. They dont list it by OS, as the OS may change. i.e. MY06 Vette had 5 OS's IIRC. 10 Camaro also had 4 or 5.

Seems for 10, 11 and 12 GM managed to finally use the same ECM for each of 3 years.