Black Bandit Tunes SOTF Tuning File icon displayed on a white background
6.6L Duramax L5P SOTF Tuning Package | 2017-2026 GMC/Chevrolet

Switch On The Fly (2017-2023)

$1,299.00
$1,299.00
Sale Sold out
  • Black Bandit Tunes SOTF Tuning File icon displayed on a white background
1 1
GM Duramax L5P (2017-2026)

6.6L Duramax L5P SOTF Tuning Package | 2017-2026 GMC/Chevrolet

6.6L Duramax L5P SOTF Tuning Package | 2017-2026 GMC/Chevrolet

1,723 Google Reviews

SKU:L5P-SOTF

$1,299.00
$1,299.00
Sale Sold out
Tune Type

Select your vehicle

Choose your vehicle to confirm this product fits your truck

View full details

L5P Duramax Tunes for 2017–2026 GM Silverado & Sierra 2500/3500

Two ways to add power to your L5P Duramax, depending on the year you drive. Both are built to add clean, usable power while keeping your truck easy to live with day to day.

On 2017–2023 trucks, the Switch-on-the-Fly (SOTF) tune lets you move between five power levels right from the driver's seat. Turn it up for towing or a pass, dial it back for everyday driving. On 2024–2026 trucks, the Single Calibration tune gives you one dialed-in performance map with a steady, predictable power gain.

Which Tune Fits Your Truck

2017–2023 · SOTF

Five selectable levels you can change on the fly. Great if you want flexibility between towing, daily driving, and everything in between.

2024–2026 · Single Calibration

One performance map, consistent gains. A simple, straightforward boost for the newest trucks.

Selectable Power Levels (2017–2023 SOTF)

Level Power Gain
1 Stock
2 +50 HP
3 +75 HP
4 +100 HP
5 +150 HP
Cab & Chassis owners: 2017–2023 4500/5500 C&C trucks are limited to a 60 HP tune. Reach out before ordering so we can point you to the right file.
Watch your EGTs: We recommend monitoring exhaust gas temps when running Levels 4 and 5.

What You'll Need

To get set up, make sure you have:

  • A GM Duramax L5P OBD2 Flash Delete tuning interface
  • An unlocked ECM
  • Tuning credits — 6 credits for 2017–2023, 8 credits for 2024–2026

What's Included

Your order comes with a five-level tune file (2017–2023) or a single-calibration tune (2024–2026). These files are built for stock trucks with emissions equipment removed for off-road use.

Running upgraded hardware? These tunes don't cover aftermarket turbochargers, larger injectors, or major fueling changes. Message us first if your truck has any of these so we can sort out the right setup.

Get More From Your L5P

Pair your tune with the parts that make it work best:

Good to Know Before You Order

  • Each tune is built for your specific vehicle and is non-refundable under all circumstances.
  • Always include your OBD2 Flash Delete Interface serial number when ordering credits.

FAQ

What's the difference between the SOTF and Single Calibration tunes?

The Switch-on-the-Fly tune (2017–2023) gives you five power levels you can change while driving. The Single Calibration tune (2024–2026) is one fixed performance map. It comes down to the year of your truck.

How many tuning credits do I need?

You'll need 6 credits for a 2017–2023 truck and 8 credits for a 2024–2026 truck.

Will these tunes work with my aftermarket turbo or injectors?

No. These files are built for stock trucks with emissions equipment removed for off-road use. If you've added a bigger turbo, larger injectors, or made major fueling changes, contact us before ordering so we can help.

Can I keep my truck's original ECM stock?

Yes. Grab a spare unlocked E41 ECM and you can leave your original unit untouched.

Important — these aren't just tunes: These are Switch-on-the-Fly (SOTF) tunes — digital calibration files that let you change your engine's performance on the go, right from the driver's seat. Treat them like the real engine calibrations they are: run the level that fits what you're doing, keep an eye on your EGTs at higher levels, and never flash a file that isn't built for your exact truck.
Note: Please review our Terms & Conditions and Shipping Policy before ordering.

For off-road use only. The photo is for reference — your actual tuner may look different in appearance and branding.

Upgrade Your Build

Frequently Added Together

1 7