Duramax Tuner LML TCM Tune | 11-15 GM 6.6L Duramax

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Duramax Tuner LML TCM Tune | 11-15 GM 6.6L Duramax


Warning: This product can expose you to chemicals that are known to the State of California to cause cancer. For more information, visit

The 6-Speed Allison found in your 2011-2016 Chevy Silverado or GMC Sierra earned its reputation for excellence largely because of the advanced electronic control provided by the TCM (Transmission Control Module). Changing that factory calibration is especially important for you when you modify your truck and/or install ECM Tuning. Custom TCM Tuning gives you quicker shifts, smoother operation and an overall a better driving experience.

Included in our Price

  • Transmission Tune

  • No additional license required

  • Use your existing hardwared used to flash your ECM tuning

Why do you need TCM Tuning?

  • Works with ECM Tuning to provide smooth shifting and superior drive-ability

  • Torque converter lockup strategy helps you put power to the ground when you need it the most

  • Improve clutch holding capacity with increased line pressure

  • Makes your truck feel more powerful

  • Prevents short-shifting in performance applications

  • TCM Tuning in the best tool to ensure your engine is operating within its preferred rev range

TCM Tuning is especially important for trucks with:

  • Custom ECM Tuning

  • Larger tires (35”+)

  • Modified turbo(s)

  • Built transmission

  • Any modification that impacts operating RPMs

Towing & Performance

  • Use the wider torque curve provided by ECM Tuning

  • Keep your truck in its power-band when lugging up a grade

  • Quicker shifts mean less time between gears and more time putting power to the ground

  • Optimize your aftermarket performance parts

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