GM/Delco chip numbers
Mike Fahrion
mfahrion at bb-elec.com
Wed Dec 31 16:05:38 GMT 1997
>
> 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
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