GM Duramax L5P - TCM Tuning Upgrade Kit (2017-2023)
Type: All-in-one Kit | Fits: GM Duramax
Unlock the full potential of your L5P Duramax with the Black Bandit TCM Tuning Add-On Bundle. This complete package combines an unlocked TCM, specialized tuning files, and tuning creditsβproviding the ultimate upgrade for smoother shifts, stronger performance, and improved drivability.
Vehicle Compatibility
-
2017β2019 GM Silverado / Sierra 2500β3500 (L5P Duramax)
-
2020β2023 GM Silverado / Sierra 2500β3500 (L5P Duramax)
- Not compatible with gasoline vehicles (special programming available separately for T93)
Choose Your Model Year
- 2017β2019 β Bundle includes an Unlocked T87A TCM, optimized for both 6-speed and 10-speed transmissions.
- 2020β2023 β Bundle includes an Unlocked T93 TCM, the modern successor to T87A, designed with advanced diesel programming and optional gasoline support.
Specifications
| Feature | 2017β2019 (T87A TCM) | 2020β2023 (T93 TCM) |
|---|---|---|
| TCM Type | Unlocked T87A | Unlocked T93 |
| Transmission Support | 6-speed & 10-speed | 10-speed, advanced diesel programming |
| Included Credits | 4 | 4 |
| Tuning File | Custom TCM tune | Custom TCM tune |
| Required Interface | OBD2 Flash Delete Tuning Interface (sold separately) | OBD2 Flash Delete Tuning Interface (sold separately) |
Whatβs Included
- Unlocked TCM (T87A or T93 based on year)
- GM Duramax L5P custom TCM tuning file
- 4 tuning credits
Key Features
- Revamped shift schedules for improved drivability
- Modified shift points to stay within boost range
- Finely tuned shift feel for smoother operation
- Optimized torque converter lock-up settings
- Adjusted transmission line pressure for durability
- Comprehensive calibration for both towing and performance use
Requirements
-
GM Duramax L5P β OBD2 Flash Delete Tuning Interface (not included).
- If purchased with an All-In-One DPF/DEF/EGR Delete Kit, the interface is included.
- Serial number required when purchasing credits if you already own the OBD2 interface.
Important Information
- Final Sale β This TCM tuning bundle is non-refundable.
- Ensure Compatibility β Select the correct year range for your truck before ordering.
Important Notes:
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While we ship with all required USMCA/CUSMA paperwork, U.S. Customs or carriers may still apply duties or fees at delivery. For details, see U.S. Customs & Border Protection
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Return Policies
Your satisfaction is important to us. If you wish to return an item or request a refund, please review the terms and conditions outlined in our Returns Policy.
Important Notices
- OffβRoad Use Only
Products sold by JS Speed are intended for offβroad use and may be illegal on public roads where emissions or pollutionβcontrol laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicleβs factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
