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Thread: 2015 silverado reduced engine power

  1. #1
    Tuner in Training
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    2015 silverado reduced engine power

    Tuning a 2015 today.... made all the changes and after customer left he got a reduced engine power.. truck still drives fine.. anyone else had this issue?

  2. #2
    Senior Tuner Ben Charles's Avatar
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    Nope

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    Anyone tuned a 2015? Non flex fuel? Seems to be the ones doing it.. my buddy in Texas having same issues.

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    Senior Tuner DSteck's Avatar
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    Did you try to edit the speed limiter?

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  5. #5
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    DSteck yes I edited speed limiter. Customer states once he clears it it goes away and truck drives fine but every time he starts it he gets the REP

  6. #6
    Does it have headers on

  7. #7
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    Truck has Intake that's it

  8. #8
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    Put the stock file back in and see how it acts. Just an intake should run just fine.

  9. #9
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    Quote Originally Posted by ElecTech View Post
    Put the stock file back in and see how it acts. Just an intake should run just fine.
    I can put stock file but point was to tune it lol... I'll go step by step and c what's the cause thanks guys

  10. #10
    Senior Tuner DSteck's Avatar
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    Put the limiter back to stock.

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  11. #11
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    Quote Originally Posted by DSteck View Post
    Put the limiter back to stock.
    will give that a try... I'll get back with u

  12. #12
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    Quote Originally Posted by DSteck View Post
    Put the limiter back to stock.
    So far so good... put limiter back on and customer hasn't Co tact me. . Thanks for the tip

  13. #13
    Wat limiter speed limit

  14. #14
    Advanced Tuner veee8's Avatar
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    Must be if you change the numbers on the calibration side. If you just change it from GMLAN to Calibration and dont change the limiter numbers, no reduced engine power message, but if you change the numbers, it will throw the error.
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  15. #15
    Advanced Tuner Road's Avatar
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    What code was it setting?

  16. #16
    Advanced Tuner veee8's Avatar
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    No code, just the message on the dash. Truck would seem to run fine otherwise. Had a 2015 C7 in for a tune yesterday too, same deal, reduced engine power on the dash if you messed with the top speed limiter settings. Hoping this can be an easy work around on the software end.
    www.crawford-racing.com
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  17. #17
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    Quote Originally Posted by veee8 View Post
    No code, just the message on the dash. Truck would seem to run fine otherwise. Had a 2015 C7 in for a tune yesterday too, same deal, reduced engine power on the dash if you messed with the top speed limiter settings. Hoping this can be an easy work around on the software end.
    yes no code... hope it gets fixed soon. other than that no issues

  18. #18
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    Was there ever a fix for this? I'm getting the same message on the dash when I changed the speed limiter settings

  19. #19
    Advanced Tuner veee8's Avatar
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    Yes, just don't max the limiter out. Just raise it.
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  20. #20
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    Ok thank you I'll give that a try