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Thread: 2000 Silverado with a 7.4

  1. #1
    Member Dirktdolman's Avatar
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    Default 2000 Silverado with a 7.4

    I have a buddy who has a 2000 Silverado with a 7.4 (454)(I believe a L29). I tried to read his ECU and it returned an error saying it is locked. I checked the supported vehicles list and the 7.4 was not on the list. Will the EFI read the 7.4 ECU?
    Last edited by Dirktdolman; December 5th, 2016 at 01:53 PM.
    2003 Chevrolet Silverado 2500HD 6.0L Automatic 4 X 4

  2. #2
    Joe (Moderator) joecar's Avatar
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    It probably won't.

    It will be able to scan and log.

  3. #3
    Member Dirktdolman's Avatar
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    Well BUMMER, THANKS
    2003 Chevrolet Silverado 2500HD 6.0L Automatic 4 X 4

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    That's a Vortec Black Box PCM, it should be readable and tunable. However, that controller is End of Life, so what parameters are there are there and will not be looked at again.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

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    Member Dirktdolman's Avatar
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    Quote Originally Posted by ScarabEpic22 View Post
    That's a Vortec Black Box PCM, it should be readable and tunable. However, that controller is End of Life, so what parameters are there are there and will not be looked at again.
    What do you mean End of Life?

    Should I still be able to access the settings? If so, what do you think the error is? I only used the V2.
    2003 Chevrolet Silverado 2500HD 6.0L Automatic 4 X 4

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    Development has been completed and will not be looked at again. If there are any bugs/inconsistencies, they will not be addressed. Just like software, they're still available to use and tune, just no updates/fixes will be made.

    Did you select the Vortec Black Box PCM when attempting to read the vehicle? I'd start off with a laptop and try to read it using V7.5 or V8.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

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    Member Dirktdolman's Avatar
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    Quote Originally Posted by ScarabEpic22 View Post
    Development has been completed and will not be looked at again. If there are any bugs/inconsistencies, they will not be addressed. Just like software, they're still available to use and tune, just no updates/fixes will be made.

    Did you select the Vortec Black Box PCM when attempting to read the vehicle? I'd start off with a laptop and try to read it using V7.5 or V8.
    I never saw that option on the V2. I will try my laptop next. THANK YOU
    2003 Chevrolet Silverado 2500HD 6.0L Automatic 4 X 4

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    Quote Originally Posted by Dirktdolman View Post
    I never saw that option on the V2. I will try my laptop next. THANK YOU
    You would have had to set up the controller in the BBX options and update the configuration files on your V2 for it to appear. Try it out and report back!
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  9. #9
    Member Dirktdolman's Avatar
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    I did not go the BBX path. I just hook the laptop up and used the Tune V7.5. I finally got it to download using the L31 Vortec 98-00 PCM. Thanks for heading me in the correct direction. Here is the file I downloaded.

    Paul.ctz
    2003 Chevrolet Silverado 2500HD 6.0L Automatic 4 X 4

  10. #10
    Lifetime Member SS2win's Avatar
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    Before you license the vortec computer, consider doing an 0411 ECM upgrade and Licensing that controller instead. There's a hell of a lot more you can do with the 0411 compared to the vortec. Anyway glad you got it figured out.
    2001 Camaro SS
    EFILive Custom OS3

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