SOTF Tune 2020-2023 Duramax L5P for HP Tuners

Take performance to the next level on your 2020, 2021, 2022, or 2023 Chevy Silverado or GMC Sierra with our Switch on the Fly Tuning for the L5P Duramax.

Our tunes are purpose built and the switch on the fly (SOTF) option gives you the power to select from five different power levels on the fly using your factory steering wheel controls or the HP Tuners Diesel Switch.

Gone are the days of spending 10 minutes changing your tune when you need to tow. The switch on the fly (SOTF) tune puts convenience and functionality at your fingertips... literally. 

Our power level options for 2020 - 2023 L5P Duramax Trucks with a factory turbo are:

Optimized Stock Tune

• Refined factory settings
• Smoother running engine & power delivery
• Reduced exhaust temperatures
• Leaves factory rev limit in place

Heavy Tow Tune

• For those towing from 8,000 lbs up to GVWR (Gross Vehicle Weight Rating)
• + 90 RWHP, + 120 ft-lbs torque over factory
• Wider torque curve assists heavy loads
• Perfect balance of sport driving & functionality
• Exhaust temperatures drop up to 100F under full load

Light Tow Tune

• For those towing any load up to 8,000 lbs
• + 110 RWHP, + 200 ft-lbs torque over factory
• Designed for weekend tower, boats, small tractors, etc
• Perfect balance of sport driving & functionality
• Unhook and enjoy a sportier drive

Sport Economy Tune

• Fun “unloaded” daily driving
• For driving around town, highways
• Impress your friends
• Put a smile on your face
• + 140 RWHP, +300 ft-lbs torque over factory
• Puts your vehicle near the 550 RWHP mark

Race / Max Effort Tune

• Maxes out the factory Turbo
• + 210 RWHP, + 500 ft-lbs torque over factory
• Puts your vehicle near the 600 RWHP 1360 ft-lbs mark
• Up to 620 RWHP / 1380 ft. lbs with WC Fab turbo mouthpiece
• Strongly recommend transmission tune to avoid premature wear

Additional Options:

Transmission Tuning

• Increased transmission line pressure for holding more horsepower and torque
• Revised shift schedule to improve drive-ability
• Keeps the truck on top of the turbo
• Improved shift timing
• Re-designed torque converter lock-up strategy
• Allows power transfer from the engine to the wheels more directly
• Unlocked T93 TCM
• 4 required HP Tuners Universal Credits

Required for Tuning the L5P ECM:

1. HP Tuners MPVI3 - this is used for programming the ECM and TCM if you decide to do so. 
2. HP Tuners E41 Upgrade Cable - this cable is used to unlock the factory ECM which then allows for a modified calibration to be loaded into the vehicle.
3. HP Tuners Universal Credits - 8 Universal Credits are required for programming the ECM and 4 Universal Credits are required for programming the TCM (TCM is optional and can be done at a later date).
4. Unlocked T93 TCM - This is required if you are doing a transmission tune. The factory TCM must be unlocked prior to tuning. This Unlocked TCM will actually replace your factory TCM.