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Thread: list of GM Obd1 Flash based PCM

  1. #1
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    list of GM Obd1 Flash based PCM

    If anyone is interested here is the list.
    It is from some tech2 manual
    Attached Images Attached Images

  2. #2
    RIP EagleMark's Avatar
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    We can always find a spot in our link thread for stuff like this!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  3. #3
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    hmm..... i know some Geos had flash units earlier than that.... and i want to say some saturns as well?

    those aren't really mainstream GM brands though
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  4. #4
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    Geo Storm was the first but technically they were EEPROM, not flash. The 92-93 J car with 2.2 and 5 speed could also be reprogrammed through the ALDL, but again, EEPROM not flash. Saturn? A different kind of car...

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    for purposes of being able to change a calibration without removing/replacing a PROM, EEPROM and flash are essentially the same, yes?
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  6. #6
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    Flash is techically a type of EEPROM. However, flash can have parts of the memory erased and re-written while the older EEPROM chips required the whole chip to be erased before writing.

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