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Thread: Speed limiter setting on E78 PCM - Chevrolet Silverado 2500 HD 2011

  1. #1
    Member Treurentner's Avatar
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    Nov 2005
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    Default Speed limiter setting on E78 PCM - Chevrolet Silverado 2500 HD 2011

    Hi folks,

    if I set on the E78 the H0156 "Speed limiter source" to PCM - will this bring me full control over the
    limiter via PCM or are still any other modules involved or affected?

    I have to limit a 2500 HD Chevy to 55 mph due to gross wight reasons on car registration.
    So I´d need only a lowering of the limit.
    Has anybody done that already?

    I´m asking, because the customer has a 200 mls trip to bring me the car for reprogramming and I don´t want to disappoint him, if it does not work.

    Many thanks in advance

    Kind regards

    Marco

  2. #2
    Lifetime Member Boost's Avatar
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    Dec 2006
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    Default

    It will work, and yes you must click PCM control to take effect.
    - Roland
    GM dealer tech since 2005
    '01 Z28 LS1/T56
    t-tops :usa:
    stock 241 heads, stock cam,
    stock muffler, factory wheels

    8.2 @ 86
    (1/8th mile with 255 Toyo Proxes)
    I am learning...

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