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Thread: OS 12579405

  1. #16
    LT1 specialist steveo's Avatar
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    the chips have a tested and a designed minimum number of erase/rewrites but the maximum is an unknown.

    the 28F512 chips i work with are designed for a 100,000 write cycle minimum life span. newer ones can handle more.

    with a 100k life span, that means if your year 2000 car was reflashed 13 times a day every single day of the year since it was made it would just be reaching that theoretical maximum now but would likely keep going for way longer.

  2. #17
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    I did some "burn till fail" flash and eeprom testing about 20 years ago and even then they were good for over 100,000 erase/writes and that was flipping each bit. Even then, failure wasn't complete, just failed on the first try. Incomplete erase(fuse) is the usual failure and mostly due to low voltage. Write fail(blowing the fuse bit) is usually a condition of low voltage too but can truly be many other reasons. The substrate technology is, of course, better now and has been improving since day 1.

    I'm playing with some boot repair stuff on the lt1 computers, wish me luck :)
    -Carl

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  4. #19
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    Thanks, I am very confident Tom will accomplish his goal. I am still working on an almost strictly software attack via the obd port. I finally got my order from china of extra chips, sockets, adapters, zif's and such so I can kill stuff at will
    -Carl

  5. #20
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    Another question I have is I must be missing something or doing something wrong. I bricked my original computer and another computer I have. I did successfully clone a computer to my original bin and it works fine. I just reflashed one of the bricked computers and it finished the program but still not correct for my truck. Any help I can get I would appreciate it. I am using my stock bin file with different xdf files listed on this site but no luck. Using the tuner pro program to do the bin and xdf files modifications. Using the ls droid to program. My stock bin file is from os12579405. Is this the issue?Thanks guys
    Last edited by j23; 06-02-2020 at 04:05 AM.

  6. #21
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    If you somehow force fed a BIN file to your PCM that had been edited with a mis-matched XDF, then yes, that could be an issue. This situation would generate erroneous checksums that could "brick" your PCM.

    If you are adamant about sticking with your 9405 original operating system, you will likely need to seek someone equipped and skilled with HP Tuners or EFI Live. As far as I can tell, there is no matching XDF file for use with OS 12579405.

    Rick
    1970 Chevy El Camino, LM7 Engine, 4L60E - Two 896 and two 0411 PCM's

  7. #22
    Electronic Ignition!
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    Hey Rick and others thanks for the responses. Rick I am not stuck on using the bin file I have it is the only one I have and the bin from my original computer. I just need something that works. If you have any other bin files that will work for my 03 sierra then I will take it. The xdf files you told me about just don't work with my bin file I guess. I know you said you have done several with no issues. So I am all ears for help and info. Thanks again guys.

  8. #23
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    The 12587603 BIN and its associated XDF file should work for your 1 megabyte PCM. Did you find this set of files? They are on this site or I could send them to you.

    Rick
    1970 Chevy El Camino, LM7 Engine, 4L60E - Two 896 and two 0411 PCM's

  9. #24
    Electronic Ignition!
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    I didn't find those files. I would greatly appreciate if you did send me the files. Hopefully I can get those to work for me. Still have not been able to get the fans working yet but I know I should be able to with these files. Thanks again.

  10. #25
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    Quote Originally Posted by B52Bombardier1 View Post
    Could be that question. Yes, certainly could be. But is that number of flash cycles before failure so low as to be relevant? I have flashed a few of my PCM's perhaps a half a dozen times to no ill effect as far as I can tell. Does anybody know how many times a GM P01 or P59 can be flashed? I have not seen this question asked or answered before . . . good question.

    Rick
    Have flashed both my P01 and P59 in my Express van hundreds of times.

  11. #26
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    Hello,

    I can send them to you by regular email or you can find the BIN here:

    https://github.com/BoredTruckOwner/L...0Files/P59_1Mb

    And the XDF here:

    https://github.com/BoredTruckOwner/L...0Files/P59_1Mb

    Rick
    1970 Chevy El Camino, LM7 Engine, 4L60E - Two 896 and two 0411 PCM's

  12. #27
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    That would be great. My email is jrlsonoma@yahoo.com. Thanks for your help

  13. #28
    Carb and Points! speed8319's Avatar
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    Could you send me the 12587603 BIN and xdf files as well thanks speed8319@hotmail.com

  14. #29
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    Check your email . . .

    Rick
    1970 Chevy El Camino, LM7 Engine, 4L60E - Two 896 and two 0411 PCM's

  15. #30
    Carb and Points!
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    Quote Originally Posted by B52Bombardier1 View Post
    Hello,

    I can send them to you by regular email or you can find the BIN here:

    https://github.com/BoredTruckOwner/L...0Files/P59_1Mb

    And the XDF here:

    https://github.com/BoredTruckOwner/L...0Files/P59_1Mb

    Rick

    Apologies for bringing this thread back from the dead, but it's the most recent I've found referencing 12579405 xdf.

    Using the 2004 xdf linked appears to be extremely offset, nothing matches up with values that make any sense
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