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2011-2016 GMC/Chevy LML Duramax 6.6L TCM Tuning | EFILive

(2 customer reviews)


We recommend this for all A50 & T87 controllers. It has an aggressive Line PSI slope which will model a torque curve 100% above stock. The line PSI is modified in such a way that the truck will still retain good mileage yet hold high line psi (close to 245-300psi under full load) following this torque curve. Line PSI is increased across the board, so as a result, fuel economy may be lower in some cases.

This tuning package can only be installed using an EFILive AutoCal V2, FlashScan V2 or AutoCal V3.

PPEI is making great strides in expanding the performance of on-highway vehicles and only offers emissions compliant tuning.

SKU: T-1116DT-EFI Categories: , Tag: Compatible Years: 2011, 2012, 2013, 2014, 2015, 2016 Compatible Model/Engine: GMC/Chevy LML Duramax


  1. Littleton58 (verified owner)

    I purchased the TCM tunes for my LML, and I could not be more happy. The TCM tuning helped my truck adjust to the new engine power of my 80hp tune seamlessly.

  2. Littleton58 (verified owner)

    I highly recommend getting the TCM tunes for your truck if you plan on getting ECM tunes. The combination of both make for a seamless transition in helping your truck to adjust to its new power. I couldn’t be more happy.

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Redefining The Limits


Years Tuning


Vehicles Tuned

2 Million+

HP Gained


Dyno Tests