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Thread: LB7 $0544 when attempting to activate license

  1. #1
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    Default LB7 $0544 when attempting to activate license

    Have a 2002 LB7. Read the tune out fine. When trying to activate the new license to flash it, I keep getting the $0544 serial number invalid code. The VIN is normal, the serial number is 00000000000. Anyway to get around this or is the ECM trashed? I've had the corrupt ECM in the past that I could not read with wack VIN numbers, never saw this before. Any help would be appreciated

  2. #2
    Lifetime Member Road's Avatar
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    Quote Originally Posted by harbin_22 View Post
    Have a 2002 LB7. Read the tune out fine. When trying to activate the new license to flash it, I keep getting the $0544 serial number invalid code. The VIN is normal, the serial number is 00000000000. Anyway to get around this or is the ECM trashed? I've had the corrupt ECM in the past that I could not read with wack VIN numbers, never saw this before. Any help would be appreciated
    Keep trying it will eventually retrieve a serial number

  3. #3
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    Quote Originally Posted by Road View Post
    Keep trying it will eventually retrieve a serial number
    How many times would say is enough lol? I tried at least 20 times with no change. Thanks

  4. #4
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    I know it's kind of normal, but I do have to use the "try alternate keys" and "assume lock" or I get a security code error. I've pulled the radio and amp fuses and the truck doesn't have an aftermarket alarm/ remote start on it

  5. #5
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    Well, he took it into he dealer that he works at and they couldn't flash it, I tried for 2 hours straight and it would give the 0544 everytime. ECM is junk in my book

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