GM Duramax L5P -Unlocked TCM (2017-2023)
Type: Tuner | Fits: GM Duramax
Take your L5P GM Duramax Silverado or Sierra to the next level with Black Bandit’s unlocked T87A & T93 TCMs. Designed for both 8-speed and 10-speed transmissions, these TCMs deliver unmatched customization, quicker shifting, and maximum reliability—perfect for enthusiasts who demand more from their trucks.
Vehicle Fitment
✅ 2017–2019 Chevrolet Silverado 2500/3500 Duramax L5P (T87A TCM)
✅ 2017–2019 GMC Sierra 2500/3500 Duramax L5P (T87A TCM)
✅ 2019–2023 Chevrolet Silverado 2500/3500 Duramax L5P (T93 TCM)
✅ 2019–2023 GMC Sierra 2500/3500 Duramax L5P (T93 TCM)
❌ Not compatible with non-L5P Duramax or non-matching transmission variants
Specifications
| TCM Variant | Years Supported | Key Features |
|---|---|---|
| T87A TCM | 2017–2019 | Optimized for 8 & 10-speed transmissions. Comes unlocked, tuning-ready. |
| T93 TCM | 2019–2023 | Successor to T87A, focused on diesel vehicles. Unlocked with special programming options for gasoline vehicles. |
What’s Included
- Unlocked T87A or T93 TCM (based on your truck year)
- Ready for tuning with MPVI / MPVI2 and VCM Suite
- Detailed purchase and install instructions
Key Features
- Unlocked, plug-and-play TCMs tailored for your model year
- Immediate compatibility with tuning software
- Optimized shift schedules for smoother drivability
- Enhanced durability with refined transmission pressure control
- Unlocks full tuning potential without downtime or send-out service
Benefits
- Quicker, stronger, and smoother shifts
- Extended transmission life with sturdier tuning adjustments
- Seamless integration with performance engine tunes
- Maximum control and customization of your truck’s drivetrain
Purchase & Installation Guide
- Identify your Serv# on top of your TCM.
- Select the correct Serv# during purchase.
- Provide your VIN at checkout.
- Install the TCM and follow instructions for best results.
Requirements
-
OBD2 Flash Delete Tuning Interface (sold separately)
-
Universal Tuning Credits (not included; must be purchased separately)
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Important Notes:
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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
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control 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 vehicle’s 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.
