It isn't at the hardware level because that same part number (before it becomes a GMPP ECU) is used in some model year production vehicle applications.
You can also put the GMPP calibration into the production vehicle service part if you get the correct part number ECU. And you can put production software in the GMPP ECU if you make sure it is a compatible OS (careful because if it isn't compatible you can "brick it").
As far as I know only two OS's exist for the GMPP E67 ECU's:
12638778
19211212
Neither of these OS's are used in production vehicle applications.
Anyone know of any other OS's used in the GMPP E67s?
As was already pointed out differences exist in the GMPP calibration compared to the production vehicle calibrations for anti-theft related reasons so that the GMPP ECM can't be used as a way to bypass GM's production anti-theft ECU calibration logic. Plugging a GMPP ECU into a production vehicle can't be used as a way to bypass the anti-theft requirements of the production applications (to meet Federal vehicle anti-theft requirements).
Quote:
Originally Posted by andrewb70
Dave,
First of all, thank you for all the information that you have provided. It has been invaluable!
John and I discussed this in detail and we suspect that at some point GMPP altered the E67 ECUs that come with their kits.
Lous69 was able to make it work on his Camaro and so have others I believe. I bought my GMPP kit back in 2008, but I have yet to implement this on my GTO.
As stated earlier, I think at some point GMPP made changes to the ECU, most likely at the OS level. It doesn't seem likely that GM would alter the ECU at the hardware level as that would greatly increase cost. But making simple revisions to the OS probably only required some programming time, which only adds a little bit of cost.
This is all conjecture of course as we don't have the knowledge or the needed software tools to know for sure.
Andrew
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