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GM Duramax L5P – TCM Tuning Upgrade Kit (2017-2023)

All-in-one Kit
Select the model year of your truck to ensure compatibility:: 2020-2023
Sku: L5P-TCM-KIT-T93
Vehicle Fitment:
2017-2023 L5P GM Duramax
Chevrolet Silverado / GMC Sierra 2500/3500 6.6L
Regular price
$978.98 USD
Regular price
Sale price
$978.98 USD
Shipping calculated at checkout.


Notification for the incorrect product/variant will be listed here.

Click here to find the right tuner for your truck!


Within the device vehicle info section, look for the value with the text containing "14C204":

Once you receive the device, please contact us with your serial number, VIN, and ECU strategy so we can create the custom tunes and send it to you for tuning your vehicle.



Please agree to our Terms of Service for the Sprinter tune:

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Vendor: Tuner Depot

Please note: All sales of exhaust pipes, straight pipes, and engine pipes are final and Non-Returnable and Non-Refundable


For off-road use only

Image is for demonstration purposes only. Actual device may vary in color and branding

Upgrade & Tune your TCM: A TCM Tuning Add-on Bundle for L5P GM Duramax (2017-2023)

Unleash unmatched transmission performance and precise calibration with Tuner Depot's exclusive TCM Tune Add-on Bundle tailored for your L5P GM Duramax vehicles. A fusion of a New Unlocked TCM, advanced TCM tuning files, and essential tuning credits - this bundle stands as the epitome of vehicular transmission performance optimization.

Choose Your L5P Model Year:

Make your selection between 2017-2019 or 2020-2023 to ensure a seamless fit and compatibility with your truck.

  • 🔧 2017-2019: Your bundle will feature the unlocked T87A TCM optimized for both 8 and 10-Speed transmissions.
  • 🔧 2020-2023: For the newer vehicles, the bundle incorporates the T93 TCM, a modern successor to T87A with a focus on diesel vehicles and special programming options for gasoline ones.

Essential Components of this TCM Tuning bundle:

The following components are part of this bundle to maximize the potential of you TCM Upgrade:

Specialized TCM Tuning File:

Dive deeper into the transformative capabilities with:

  • > Revamped shift schedules.
  • > Modified shift points.
  • > Finely-tuned shifts.
  • > Optimized torque converter lock-up settings.
  • > Adjusted transmission line pressure.

Note: a GM Duramax L5P – OBDii Flash Delete Tuning Interface is not included in the bundle. You need to purchase that separately. If you are purchasing this bundle along with a All-In-One DPF/DEF/EGR Delete Kit then the OBDii Tuning interface will be included in that kit. 

If you already have The GM Duramax L5P – OBDii Flash Delete Tuning Interface you will have to provide us serial number for purchasing credits.


This bundle is a final sale product. It's non-refundable. Please ensure the components meet your needs before finalizing the purchase.

*Please review the Terms & Conditions, as well as our Shipping Policy below.*


  • Off-Road Use Only: The products sold on this website are intended for off-road use only, and may not be legal for use on public highways where pollution control laws apply.
  • Check Local Laws: Before purchasing and installing any of these parts, please check your local and state laws to confirm whether the modifications are legal in your area.
  • Professional Installation Recommended: These kits and parts are strongly recommended to be installed by professional mechanics only. Improper installation may lead to performance issues or damage to your vehicle. Please note that, unless specified differently on the product page, our parts do not include installation instructions. Our components are intended for individuals with a proficient understanding of mechanical systems and procedures. Like many aftermarket parts compatible with a variety of vehicles, minor adjustments or modifications may be necessary during the installation process. We cannot accept returns or offer refunds on the basis of an inability to complete the installation due to the absence of instructions.
  • Warranty: The use of these parts will void the warranty of your vehicle. Please confirm with your vehicle manufacturer before purchase and installation.
  • No Liability: Tuner Depot is not responsible for any damage or issues that may arise from the use of these parts.
  • Product Images: Product images are for illustrative purposes only and may differ from the actual product due to manufacturer design changes or improvements.
  • No Performance Guarantees: While these parts are designed to enhance the performance of your vehicle, no guarantees are made regarding the specific performance gains that will be achieved.

Shipping Policy

At Tuner Depot, we understand the importance of timely delivery when it comes to your performance parts. We are committed to ensuring a seamless shipping experience, striving to dispatch your orders with utmost efficiency and speed.

Our Shipping Policy: Our aim is to dispatch all orders within two business days, providing you with a quick and efficient processing time. However, please bear in mind that unforeseen circumstances beyond our control may occasionally impact shipping times.

Factors Affecting Shipping:

Weather Conditions: While we pride ourselves on our fast and efficient order processing, adverse weather conditions such as rain, snow, or sleet may affect delivery timelines. We assure you that we will make every effort to overcome such challenges and minimize any delays.

Holiday Periods: Even our dedicated team needs a well-deserved break during holidays. Please note that our shipping center will be closed on such occasions. Rest assured, we will resume shipping promptly on the next business day. During peak holiday seasons, please allow for potential delays, but be assured that we will keep you informed every step of the way and work diligently to deliver your order as swiftly as possible.

Staff Availability: While we have an exceptional team, we recognize that unforeseen circumstances can occasionally affect our staffing levels. In such cases, we may experience minor delays. However, we want to assure you that we are committed to swiftly resolving any staffing issues and maintaining our high standards of service.

We genuinely appreciate your understanding and patience during any unexpected obstacles we may encounter along the way. Be assured that we will utilize every resource available to deliver your performance parts to you promptly.

Thank you for choosing Tuner Depot, where our passion fuels our commitment to outstanding customer service.

Happy tuning!