Upgrade to SOTF Tune 2024-2026 Duramax L5P for HP Tuners

Switch on the Fly (SOTF) is now here for the 2024–2026 L5P Duramax. If you already run a Motor Ops single tune or 4 tune pack on your E42 ECM, this upgrade lets you change between tunes 1–5 right from the steering wheel. There's no laptop and no reflash needed to switch.

Choose your upgrade

• Upgrade from Single Tune ($649.99): for customers who already bought a Motor Ops single tune for their 2024–2026 L5P.
• Upgrade from 4 Tune Pack ($249.99): for customers who already bought the Motor Ops 4 tune pack for their 2024–2026 L5P.

Your 5 tune slots

Tune 1: Optimized Stock

• Refined factory calibration
• Removes pedal lag
• Improves the factory power so the truck runs smoothly
• +15 RWHP over factory

Tune 2: Heavy Tow

• Designed for towing any size load up to gross vehicle weight rating (GVWR)
• Wide torque curve to improve your towing experience
• Completely fine to drive unloaded as well
• EGTs at or below factory calibration
• +40 RWHP, +100 ft-lbs torque over factory

Tune 3: Light Tow

• For towing any load up to 8,000 lbs
• Designed for weekend towing, boats, small tractors and more
• Unhook and enjoy a sportier drive
• +90 RWHP, +200 ft-lbs torque over factory

Tune 4: Sport Economy

• Sporty and safe tune to run every day
• EGTs stay at or below factory levels
  

Tune 5: Race / Max Effort

• Maxes out the factory turbo
• +160 RWHP, +260 ft-lbs torque over factory

How to change tunes from the steering wheel

1. Hold the Cancel (X) button on the left side of the steering wheel for 3 seconds. Tune selection starts at tune 1.
2. Push +RES up to step through tunes 1 to 5.
3. Watch the tune number to the left of the speed readout on the dash. It turns green once the new tune is confirmed, then holds in grey.

How to order

• Add the upgrade that matches your current tune to your cart and check out.
• Send us your truck's VIN and whether your dash units are imperial or metric.
• Your SOTF tune is delivered within 48 hours.

Delivery

Tunes are sent only through the HP Tuners TDN app. We do not email tune files directly to customers.

Requirements

• A 2024, 2025 or 2026 Chevy Silverado or GMC Sierra with the L5P Duramax and an unlocked E42 ECM.
• An existing Motor Ops single tune or 4 tune pack for that truck.
• HP Tuners hardware and the TDN app to receive and load your tune.

New customer? Full SOTF tunes for new customers are coming in the next few weeks.

Questions? Call us at 866-867-1593.