2019-2023 L5D Duramax Custom Performance Tuning

Calibrated Power Solutions - L5D Tuning Package includes everything you need to tune your 2019 - 2023 L5D Duramax. Does NOT delete or tamper with emissions equipment to get the best performance out of your truck. Calibrated Power's L5D Tuning Packages unlocks the power potential that you paid for when you bought the truck from the factory.

Factory rated output for the L5D is 350 HP and 750 ft-lbs of torque, 95 HP and 160 ft-lbs less than the L5P used in the 2500 and 3500 pickups. Our favorite part about these trucks is how well they respond to tuning! With up to +125 RWHP over stock on tap (depending upon tune selection) it's like driving a whole different truck!

Total flexibility to switch on the fly while driving between all five of emissions intact custom tunes for your 2019, 2020, 2021, 2022, 2023 Chevrolet Medium Duty 4500, 5500, 6500 or International CV515.  No need to plug in to re-flash your truck to change tunes. Giving you the power to tow light or heavy, fun daily driving, and the most we can unleash from your engine.  Have the cleanest and most reliable tunes available with the power level you need right at your fingertips.

Get Single or All Five Switchable L5P Custom Tunes

• Emissions Intact – No need to remove emissions equipment to get better performance from your truck!

Do you need DuramaxTuner Switch-On-The-Fly (SOTF) Custom Tuning?

• Instantly Switch Between Power Levels
• Total flexibility to select the power level you need  
• No need to plug in and re-flash your truck to change tunes
• Designed to be safe for your engine and emissions equipment
• DuramaxTuner has 14+ years of experience with Custom Switchable Tuning
• Fully customized tuning with more than 100+ calibration changes from stock
• No hacking wires into control units or fuel pump and turbo sensors
• More power and less soot than box programmers
• World Class Customer Service Support from the team at Calibrated Power Solutions / Duramaxtuner!

Sport Tune

• Peak Horsepower & Torque
• +125 RWHP + 240 ft-lbs
• Total 440 HP and 880 ft-lbs
• Fastest possible acceleration
• Firm shifting
• No dead pedal
• Biggest adrenaline rush we can give you

• Inappropriate use of Sport Tune
• Too much power for towing without the proper gauges
• Enough power for an irresponsible driver to damage their truck

Street Tune

• Improved Horsepower & Torque
• +100 RWHP + 180 ft-lbs
• No dead pedal feeling
• Most power & torque you can add while maintaining OEM levels of reliability
• Fast acceleration - Truck feels lighter

• Mix of Fun and Superior Driveability
• Love driving the truck everyday
• Smooth Power Curve
• Throttle pedal responds exactly how you want it to
• Retains factory turbo / exhaust brake feature

Light Tow

• Balance between Daily Driving and Towing
• Smooth Power Curve - Fun to Drive
• Custom “SMART EGT Control” automatically manages your EGTs
• Air-Fuel Ratio limits built into calibration limit soot production
• Designed to tow less than 8,000 lbs.
• Retains factory turbo / exhaust brake feature

• Horsepower & Torque Increase +80 RWHP +144 ft-lbs
• Get your truck up and moving more quickly
• More useable power in all driving scenarios
• Have enough power to “Shift Up, Throttle Back”

• Revised Pedal Sensitivity
• Low speed trailer maneuvering
• Back up with trailer without lurching

Heavy Tow

• Safe for Towing Heavy
• Increase Power, not EGTs (Exhaust Gas Temperature)
• Custom “SMART EGT Control” automatically manages your EGTs
• Air-Fuel Ratio limits built into calibration to limit soot production
• Designed to tow 8,000 lbs. up to GVWR
• Retains factory turbo / exhaust brake feature

• Horsepower & Torque Increase +40 RWHP + 72 ft-lbs
  • Get your trailer up and moving more quickly
  • Lug in the gear you want while towing
  • Have enough power to “Shift Up, Throttle Back”

• Revised pedal sensitivity
• Low speed trailer maneuvering
  Back up with trailer without lurching

Optimized Stock (Valet Mode)

• Slight revisions to factory calibration
• No significant increase of peak power
• Good for troubleshooting a physical problem with your truck
• Great for when someone else needs to drive your truck

Required Options

• HP Tuners RTD ECM Unlock Hardware
• HP Tuners GM Credits x8 for ECM
• HP Tuners MPVI3 Tuning Hardware 

Transmission Tuning

• 6-Speed Allison Heavy Duty Transmission for 2019+ L5D

  Extra attention has been invested to develop Duramaxtuner's engine tuning for L5D’s with the 6-Speed Allison Heavy Duty. Currently, there is no TCM Tuning available for these transmissions. However, the team at Calibrated Power Solutions have spent countless hours going through every aspect of the ECM Tune File to ensure you have the best driving and most effective tuning possible.