Duramax Tuner Transmission Tune Only for HP Tuners MPVI2 | 17-19 GM 6.6L Duramax L5P

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Duramax Tuner Transmission Tune Only for HP Tuners MPVI2 | 17-19 GM 6.6L Duramax L5P


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 2017, 2018 or 2019 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 this Price

  • Transmission Tuning for L5P by

  • No need for hardware - use the same MPVI2 Hardware from 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

Required Options

Modified TCM Purchase (Transmission Control Module)

  • We stock modified TCM hardware and ship directly to you

  • Remove your factory TCM and replace with our Modified TCM

  • Flash our custom transmission tune using the MPVI2 Hardware and required HP Tuners Credits

  • Ship us your factory TCM; we will refund you $200 when confirmed in working order

HP Tuners Universal Credits

  • 4 credits required for TCM tuning

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