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Thread: 2016 Chevrolet 3500 LML

  1. #11
    Lifetime Member bobo's Avatar
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    Nov 2005
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    Thank you
    Should have left it stock

  2. #12
    Lifetime Member bobo's Avatar
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    Nov 2005
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    New ECM fixed the issue. All injector codes programmed correct and shake is gone! Thanks again!!
    Should have left it stock

  3. #13
    New Member
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    May 2025
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    So I've been fighting the same issue the past few weeks, 2015 LmL with new engine installed, cp3 converted, 30% over sticks from DDP, BD Screamer Turbo, light weight exhaust! Runs and drives great, programmed IQA codes and tried all 8 codes as one code, reset learned trims, put in another new set of 30% over sticks, tune file or stock file it will shudder at light throttle 20-30% app. No tcc slip, compression is good and power balance looks good but I do have 2 codes for cyl 6 and 7 that pop up for max learned limit exceeded. It idles great, runs great at hard throttle and WOT, but super light throttle it will shudder almost like the engines quivering from inconsistent combustion and it's sending the vibrations through the powertrain, of course you can feel it big time once the tcc is locked up. I'm pretty much at the point where I want to put stock injectors in it and see if it goes away. 2 engines, and 2 sets of injectors has gotten to be an expensive learning curve!

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