The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.

HomeShop by DepartmentPerformanceTransmissionsTuningDuramax Tuner (2020-2023) L5P Switch On The Fly Remote Tuning Package w/TCM Tuning Included

Duramax Tuner (2020-2023) L5P Switch On The Fly Remote Tuning Package w/TCM Tuning Included

Thoroughbred Sku #: DUTDM1MO1371012000-CRE

Item Options:

Prop 65:

WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov

Shipping Restrictions:

This part is NOT available to ship to the state of California.

PAYMENT NOTE: If you choose Pay Core Later, from the Core option below, you will not be able to pay for this order using Affirm or PayPal

$2,672.92

* Core Exchange Option:

Terms & Conditions for Cores

Many stock replacement parts such as turbos, injectors, injection pumps, and high pressure oil pumps have a core charge that is associated with the new replacement part. You must return the old part to receive a refund on the core charge.

In some cases, the core is not reusable, such as in the event of a cracked case, at which point the core deposit would not be credited as the core component is not reusable.
Cores that have been disassembled and/or have missing and/or damaged major components will not receive full core credit.
Returned cores must be on a "like-for-like" basis, meaning that the returned core has the exact same fitment as the remanufactured component that was purchased. If the core is not "like-for-like," your core may not be eligible for return/credit.
You are responsible for core return shipping cost.

If you plan on returning your core you have two options.

Thoroughbred Diesel offers defer the upfront core charge when purchasing via credit card payment.

OPTION 1: You can accept the core charge, which means you will be charged for the part AND the core at time of purchase. You still have the option to send it back, and if you do, the core will be refunded back on the card used, presuming the core meets core criteria and the core is returned within 30 days from the time your order is received. If you return your core after 30 days you may refer to the Core Charge Timeline below as to how you will be refunded.

Core Charge Timeline

If the core is returned after 30 days, 90% of the core will be refunded.
If the core is returned after 60 days, 70% of the core will be refunded.
If the core is returned after 90 days, 50% of the core will be refunded.
After 6 months cores will be accepted at Thoroughbred’s discretion.

OPTION 2: You can defer the core charge. If you defer, you will not be charged for the core at the time of purchase. You will have 21 days from the time your order is received to send the core back. If the core is not received within the 21 days, your credit card will be charged for the core amount on your order. If you return your core after 21 days, you may refer to the Core Charge Timeline below as to how you will be refunded. When Core deferral (Pay Core Charge Later) is limited to payment by credit card only. ***When using PayPal or Affirm as your method of payment “Core Deferral (Pay Core Charge Later)” is not available. The core must be paid at time of purchase. ***

Core Charge Timeline

If the core is returned after 21 days, 90% of the core will be refunded.
If the core is returned after 60 days, 70% of the core will be refunded.
If the core is returned after 90 days, 50% of the core will be refunded.
After 6 months cores will be accepted at Thoroughbred’s discretion.

Core Return Procedure

Please keep all original packaging of your new item to be used for the core return.
Drain all fluids: oil, fuel, etc. out of the core before it is returned.
Place any plastic plugs or caps received on the new item back onto the core.
To insure UPS, Fed Ex, or USPS will not reject the package due to fuel or oil leakage, please wrap the core in a plastic garbage bag.
Place core inside the box.
If core return paperwork was inside the box, please complete the form and send back with the core.
Please provide a tracking number to [email protected]. Without a confirmed tracking number we cannot guarantee your core refund
If you have questions please call our core department 859-737-4966 ext. 5

I have read and I accept the terms and conditions.

Applications:

View All applications

VERIFY VEHICLE FIT

QTY:

Product Details
Youtube Videos
Reviews
Questions & Answers

Product Details

Product Name: Duramax Tuner (2020-2023) L5P Switch On The Fly Remote Tuning Package w/TCM Tuning Included
Manufacturer: Duramax Tuner
Manufacturer Part #: DM1MO1371012000
Thoroughbred Diesel Part #: DUTDM1MO1371012000
Fitment Notes: 2020-2023 GM Duramax L5P

Now with Calibrated Power's remote tuning for L5P there is no more hassle in removing and swapping your existing ECM. Within 30 minutes you will be able to unlock and tune your truck's existing ECM without having to remove it from the vehicle. You will have total flexibility to switch on the fly while driving between all five of our emissions-intact custom tunes for your 2020, 2021, 2022 or 2023 Chevy Silverado or GMC Sierra. Giving you the power to tow light or heavy, fun daily driving, and the most we can unleash from your engine. Have the cleanest and most reliable tunes available with the power level you need right at your fingertips. ECM Tuning, TCM Tuning, Hardware, and Credits included.

Get All Five Custom Tunes, Switchable while driving (Switch-On-The-Fly)

Emissions Intact – no need to remove your emissions equipment

Do you need DuramaxTuner.com Switch-On-The-Fly (SOTF) Custom Tuning?

Instantly Switch Between Power Levels
Total flexibility to select the power level you need
No need to plug in a clunky box and re-flash your truck to change tunes
Designed to be safe for your engine and emissions equipment
DuramaxTuner has 14+ years of experience with Custom Switchable Tuning
Fully customized tuning with more than 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!

Sport Tune

Peak Horsepower & Torque

+150 RWHP + 270 ft-lbs
Total 595 HP and 1180 ft-lbs
Fastest possible acceleration
Firm shifting
No dead pedal
Biggest adrenaline rush we can give you

Inappropriate use of the Sport Tune

Too much power for towing without the proper gauges
Enough power for an irresponsible driver to damage his truck

Street Tune

Improved Horsepower & Torque

+100 RWHP + 180 ft-lbs
No dead pedal feeling
Most power & torque you can add while maintaining OEM levels of
reliability
Fast acceleration - Truck feels lighter

Mix of Fun and Superior Drive-ability

Love driving the truck every day
Smooth power curve
The throttle pedal responds exactly how you want it to
Retain factory turbo-braking feature

Light Tow

Balance between Daily Driving and Towing

Smooth power curve that’s fun to drive
Custom “SMART EGT Control” will automatically manage your EGTs
Air-Fuel Ratio limits built into calibration to limit soot production
Designed to tow less than 8,000 lbs.
Factory turbo brake retains complete functionality

Horsepower & Torque Increase +80 RWHP +144 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”

Revised pedal sensitivity

Low-speed trailer maneuvering
Back up with trailer without lurching

Heavy Tow

Safe for Towing Heavy

Increase power, not EGTs (Exhaust Gas Temperature)
Custom “SMART EGT Control” will automatically manage your EGTs
Air-Fuel Ratio limits built into calibration to limit soot production
Designed to tow 8,000 lbs. up to GVW
Factory turbo brake retains complete functionality

Horsepower & Torque Increase +40 RWHP + 72 ft-lbs

Get your trailer up and moving more quickly
Lug in the gear you want while towing
Have enough power to “Shift Up, Throttle Back”

Revised pedal sensitivity

Low-speed trailer maneuvering
Back up with trailer without lurching

Optimized Stock

Slight revisions to factory calibration
No significant increase in peak power
Good for troubleshooting a physical problem with your truck
Great for when someone else drives your truck

Hardware Included

ECM Unlock Cable

Allows you to unlock your existing stock ECM
No more hvaing to remove your stock ECM in order to install tuning on your truck
Flash our custom tunes using the MPVI3 Hardware and required HP Tuners Credits

MPVI3 Hardware by HP Tuners (Optional if you have MPVI3/MPVI2+ Pro or newer)

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

8 credits are required for ECM tuning

Transmission Tuning Included!

10-Speed Allison Transmission for 2020+ L5P Duramax

The 10-Speed Allison found in your 2020-2023 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 shifts, smoother operation and an overall a 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 RTD Hardware and required HP Tuners Credits
- Ship us your factory TCM; we will refund you $700 when confirmed in working order

For HP Tuners L5P Unlock & Tuning Install Instructions Click Here

For more information on Duramax Tuner call us at 1-859-737-4966

Reviews

Submit a question

I tow a 20k fifth wheel with the 2022 Denali dually would this interfere with towing ability of the truck. Thank You

Scott Johnson | 11/3/2023
No, it should help with towing.

Diesel Performance Products & Parts

Diesel Truck Stock Replacement Parts | OEM Parts

Tractor Parts | Tractor Injectors, Injection Pumps, Turbos

Custom Truck Accessories - Tonneau Covers, Nerf Bars & More

Gooseneck & Fifth Wheel Hitches | Truck Towing Products

Thoroughbred Diesel Shirts, Hats, License Plates