GM/Delco chip numbers

[Shannen Durphey]

Mike Fahrion wrote:

> >
> > EEPROM=TRUE.  Can't give you many details, but we use a scantool to
> > download calibration files from the PC in the boss' office and then
> > upload them into the vehicle. Think this started in 94 or 95 Geo storm,
> > and all GM vehicles, AFAIK, are now this way.  If it's OBDII then it's
> > probably EEprom.
> >
> > Hypertech makes a reprogrammer for Camaros and maybe 'vette's, too. Saves
> > stock calibration so you can pass the smoggies.
> >
> >  Around this time last year, Steve Cole of Mastertune fame was working on
> > breaking the code.  Don't know if he got anywhere.
> >
> To my knowledge, the GM OBDII systems now use Flash instead of
> EEPROM.  I believe Steve Cole (now of The Turbo Shop) has a
> programmer now available to reprogram the flash through the vehicles
> J1850 (OBDII-type) bus.  Pretty sure I have a press release around
> here somewhere for it.
>
> -mike
> mfahrion at bb-elec.com

  ok.  Umm... what's the difference?
Shannen