Description
Get your 2019-2021 LM2 tuning from the experts. With the option to choose between 2 custom tunes designed to bring out the best in both top-end power and towing torque for the 3.0L Duramax. These tunes will improve the drivability and performance of your 3.0L Duramax using the same tuning methods we’ve honed over years of tuning the L5P to maximize reliability and longevity of the powertrain.

Our custom tuning is exactly what the LM2 needs to wake it up and unlock its true performance potential. Combining the engine tuning with T93 Transmission tuning is the ultimate way to match your transmission holding capacity, shift schedule, and torque converter clutch engagement to the new found torque of your 3.0L Duramax allowing it to lug like a diesel. LM2 ECM Unlock Service, ECM Tune, TCM Tune, Hardware and Credits included.

Here's How It Works...

Once you place your purchase with us we will send a shipping label to your email
Then remove your ECM and use the provided shipping label to ship them to us
Once we receive it we will begin the unlock process (Which takes 1-2 days)
When your ECM is unlocked we will ship it back to you with tuning hardware and tune files
You will then be ready to install them back into your truck and install our custom-tuning

Custom Tunes:

Street Tune

Improved Horsepower & Torque +40 RWHP +100 ft-lbs
Immediate throttle response, no dead pedal feeling
Significantly wider torque curve
Smooth power curve that’s fun to drive
Most power & torque you can add while maintaining OEM levels of reliability
Thermal backdowns automatically manage your EGTs and other engine temperatures to back power down before damage occurs
Fun Mix of Power and Superior Drive-ability
Quick acceleration - Truck feels lighter
Great balance between performance and everyday drivability
The throttle pedal responds exactly how you want it to
Factory turbo brake retains complete functionality
Too much power to safety tow without proper gauges

Tow Tune

Balance between Daily Driving and Towing
Air-Fuel Ratio limits built into calibration to limit soot production
Designed for towing up to 9,000 lbs.
Factory turbo brake retains complete functionality
Horsepower & Torque Increase +25 RWHP +60 ft-lbs
Get your truck up and moving more quickly
More useable power in all driving scenarios
Have enough power to “Shift Up, Throttle Back”
Get your trailer up and moving more quickly
Air-Fuel Ratio limits built into calibration to limit soot production
Revised pedal sensitivity
Low-speed trailer maneuvering
Back up with trailer without lurching

Included Service:
Unlock Your Stock LM2 ECM And TCM Service Included (Engine Control Module)

Remove your factory ECM and use the shipping label that we have emailed you to send it in
All shipping charges are included in this price
We will expedite the unlock process for you and return your ECM ready for tuning to be installed
Your other Included Hardware will ship to you with your Unlocked ECM
We generally turn Unlocked ECMs in around within 2 business days

Custom Tuning

Street Tune +40 RWHP +100 ft-lbs
Tow Tune +25 RWHP +60 ft-lbs
10-Speed transmission tuning

Included Hardware:
MPVI3 Hardware by HP Tuners Included

Connect > Read > Edit > Write > Drive.
Equipped with Bluetooth®, Proprietary Expansion Port, and Mobile Device Support
Makes it faster and easier to read, edit, and write your vehicle’s software.
VCM Editor and VCM Scanner and programming/USB cables, making up the essentials of VCM Suite - one of the most powerful and inclusive scanning, diagnostic, logging, and calibration products on the market.
Full support for our latest rendition of Track Addict - the fastest scanning, logging, and data transmission rates to ensure you capture everything.
VCM Scanner is the most powerful and comprehensive scan tool on the market.
View, chart, and log diagnostic data in real-time via the OBDII diagnostic data port.
View and clear Diagnostic Trouble Codes (DTCs) along with other vehicle module information. Command control functions like a closed loop, fans, gear select, timing, air-fuel ratio and so much more all in real-time.

HP Tuners Universal Credits Included

6 credits are required for ECM tuning

Transmission Tuning Included!
10-Speed Allison Transmission for 2020-2021 LM2 Duramax
The 10-Speed Allison found in your 2020-2021 LM2 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 shifts, smoother operation, and an overall better driving experience.

Transmission 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
Modified TCM (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 HP Tuners Hardware and required HP Tuners Credits
Ship us your factory TCM; we will refund you $700 when confirmed in working order

Why Choose DuramaxTuner.com Custom LM2 Tuning?

DuramaxTuner has 15+ years of experience tuning Duramax trucks
Designed to be safe for your engine and emissions equipment
Fully customized tuning with 100+ calibration changes from stock
No hacking wires into control units or fuel pump and turbo sensors
More power and less soot than box programmers
World Class Customer Service Phone Support!

Warning: This product can expose you to chemicals that are known to the State of California to cause cancer. For more information, visit www.P65warnings.ca.gov