If closed, when trying to read, I can never see the firmware at all and have two non-working unit in particular....))))

I'll try to resolder, at start. Look at the results...
As far as "custom"?...)) Open, closed?

I apologize for the persistence ...))) What is the type of processor?

)))
This is not an Opel and Daewoo...)) Absolutely American GM )) Chevy Cavalier 1996...
Winols? I don't need to edit. Simple - read / write...

Is the one who left?
"I think" ??? ))) How likely?
Just kidding, of course. It seems that my suspicions are correct....
What is this type of processor? Interestingly, can I read and flash it with some programmer?
GREAT Thanks for your attention!!))

If necessary, I can specify each chip...

Hi, professionals...)
There are two 16215830 (1996). One with a damaged board and, probably, burned the output driver (engine ok but 2-3 shift sol. problem). Second - officially remanufactured. Which chip (EEPROM) need to resolder from the old to the new, to avoid reflashing. Great thanks!...))