The 2500 and 3500 HD Silverado/Sierra's equipped with the 6.6L Duramax routinely have factory TCM issues that cause limp mode, loss of PRNDL display, and trigger check engine lights. The DuramaxTuner Pre-Tuned Replacement TCM is a brand new and upgraded TCM for your stock 2017, 2018, and 2019 Allison 1000 T87A Transmission Control Module. Your new TCM will arrive pre-programmed for your VIN and includes our custom, TCM Tuning.Transmission Tuning
The 6-Speed Allison found in your 2017-2019 L5P Duramax 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 shift changes, smoother operation, and an overall better driving experience.
Whats the difference between Mild and Aggressive Transmission Tuning?
Smooth Shift Points is the best choice for you if you . . .
Want similar feeling to stock shift schedule
Have a near-stock truck
Installed a Box Tuner
Are an Everyday Diesel Guy
Use your truck as a daily commuter
Aggressive/Elevated Shift Points is the best choice for you if you . . .
Have an upgraded turbocharger
Run 35+ size tires
Prefer higher RPM operation or holding the gear longer
Installed custom engine tuning
Why do you need TCM Tuning?
Works with any 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 is the best tool to ensure your engine is operating within its preferred rev range
TCM Tuning is especially important for trucks with:
Any ECM Tuning, Box Tuner, or Throttle booster
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
* ALL PICTURES SHOWN ARE FOR ILLUSTRATION PURPOSE ONLY. ACTUAL PRODUCT MAY VARY DUE TO PRODUCT ENHANCEMENT.
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