GM Duramax L5P - SOTF Tune Package (2017-2023)
Type: Tuning Software | Fits: GM Duramax
Unlock precision performance with Switch-on-the-Fly (SOTF) tuning for your 2017–2023 GM Silverado & Sierra 2500/3500 Duramax L5P. Seamlessly switch between five distinct power levels in real time—whether you’re towing, cruising, or racing. This tuning solution delivers versatility, efficiency, and control at your fingertips.
Vehicle Fitment
✅ 2017–2023 GM Silverado 2500/3500 L5P Duramax
✅ 2017–2023 GMC Sierra 2500/3500 L5P Duramax
❌ Not for 4500/5500 Cab & Chassis (C&C models use a dedicated 60 HP tune only—contact us before purchase).
Specifications
| Feature | Details |
|---|---|
| Tune Type | 5-Level Switch-on-the-Fly |
| Power Gains | 0 HP, 50 HP, 75 HP, 100 HP, 150 HP |
| Special Note | C&C trucks limited to 60 HP |
| Required Components | OBD2 Flash Delete Tuning Interface, Unlocked ECM, 8 Credits |
| Supported Trucks | Stock emissions-removed only |
| Unsupported Mods | Aftermarket turbochargers, injectors, modified fueling |
What’s Included
- 5-Level SOTF tune file
- Off-road optimized tuning for stock L5P (with emissions removed)
- Power level mapping (0–150 HP, or 60 HP for C&C trucks)
Key Features
- Instantly switch between power levels while driving
- Real-time adjustments to maximize performance and efficiency
- Designed for emissions-removed, off-road applications
- Smooth integration with stock hardware and systems
Benefits
- Tailored performance for towing, daily driving, or racing
- Enhanced throttle response and drivability
- Efficient fuel use at lower settings
- Maximum power on demand when you need it
Power Levels
| Level | Horsepower Gain |
|---|---|
| 1 | 0 HP |
| 2 | +50 HP |
| 3 | +75 HP |
| 4 | +100 HP |
| 5 | +150 HP |
Explore More Options
- GM Duramax L5P All-In-One DPF/DEF/EGR Delete Kit (2017–2023) - for a new Unlocked ECM so you can keep your original ECM stock
- Unlocked E41 ECM for GM Duramax L5P - L5P Installation Instructions
Important Notes:
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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.
