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Thread: RR & Flex Fuel Question

  1. January 25th, 2012 #11
    driver456
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    Quote Originally Posted by GMPX View Post
    Flex Fuel was only on one specific OS (12216125) for the 512K PCM. There was never any COS's written for that OS.
    Will that OS work in a 0411 pcm?Just wondering because I changed the pcm in my 99 Silverado to a 0411pcm w/12212156 os.
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  2. January 25th, 2012 #12
    joecar
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    Hi Paul, 12216125 runs on a 0411.
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  3. January 25th, 2012 #13
    driver456
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    Cool,Thanks Joe.
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