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Thread: Service Stability Control ??

  1. #1
    Lifetime Member Boost's Avatar
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    Default Service Stability Control ??

    '07 new style Silverado is throwing a lean code p0174. Why would my tune cause this? Also it sets the service stability light / message at a stop, but clears it when it gets going. Strange isn't it?

    Especially since I made sure there is nothing in the tune that affects the ebcm / abs system (no tire/ gear changes or anything).

    However, I have noticed a number of untuned trucks coming to the dealership with the Service Stability message for engine related concerns. Such as a bad mass air fklow, or a recent induction service.

    So my question is: how is the service stability light related to the engine (intake, mass air flow). And why does this truck set the message / light only when tuned? (code is P0174). Thanks.
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

  2. #2
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    Quick question do you have a cai on the 07??

    I know on the tbss's they have a reducer going from the maf to the air filter. If you take that out and not tune the maf correctly it will trough the lean code.

    Just an idea.

    I had the problem with the service stabilitrak light with previous tune I had (locked) I am guessing they adjusted something having to do with tcs??
    Mine only happened when it was cold. After I pitched that tune went efilive no more issues.

    Thats weird on the stock trucks

  3. #3
    Lifetime Member Boost's Avatar
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    No CAI. Thanks for your input. I suspect it has to do with the tune and with the lean (171 & 174) codes that it keeps resetting. I'd like to know why, but it is somehow related to the maf (?).
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

  4. #4
    Lifetime Member GMPX's Avatar
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    I am not sure either, maybe a torque setting that was altered?
    I no longer monitor the forum, please either post your question or create a support ticket.

  5. #5
    Lifetime Member Boost's Avatar
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    So far I proved that the lean codes it kept setting were causing the stability message / light to come on intermittently. Interesting. When P0171 & P0174 are blocked, the problem goes away. Still working on a better fix. I will try another version with the torque settings stock. Thanks for your response.
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

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