SOTF Tuning Package for 2017-2026 6.6L Duramax L5P
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Product Information +
- Brand: SPELAB
- SKU: SPJN-EP13-00004023
- Availability: Many in stock
- Product Type: Tuner
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PLEASE NOTE!
2017-2026 L5P Duramax Tuning Package
L5P Duramax tuning delivers two robust tuning options for your 2017–2026 GM Silverado & Sierra 2500/3500. 2017–2023 models support Switch-on-the-Fly (SOTF) tunes, letting you toggle between five distinct power levels on the move to match any driving scenario. For 2024–2026 newer trucks, our Single Calibration tunes utilize a dedicated performance map to supply steady, reliable power gains.
Both tuning solutions maximize your truck’s potential while preserving factory-like smooth drivability. Perfect for drivers seeking flexibility in earlier model years or a straightforward performance boost in the newest trucks.
Selectable Power Levels (only for 2017-2023 SOTF):
| 1 | 2 | 3 | 4 | 5 |
| 0 HP | 50HP | 75HP | 100HP | 150HP |
Note: 2017-2023 4500/5500 Cab & Chassis models are limited to a 60 HP tune. Contact us before ordering if you have a C&C truck for questions. We strongly recommend monitoring EGTs when using Levels 4 & 5.
Required Items for Tuning
To maximize your results, you'll need the following:
- GM Duramax L5P - OBD2 Flash Delete Tuning Interface
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An Unlocked E41 ECM (For 2017-2023)
- An Unlocked E42 ECM (For 2024-2026)
- Tuning credits:
- 6 credits for the year range 2017-2023
- 8 credits for the year range 2024-2026
What's Include?
Your purchase provides either a 5-level tune file (2017-2023) or a single-calibration tune (2024-2026). These calibrations are for stock trucks with emissions equipment removed for off-road applications. They do not support aftermarket turbochargers, larger injectors, or major fueling changes. Please contact us before buying if your truck has upgraded hardware.