Heavy Tow Tune Only L5D (2019-2023)
Our custom Heavy Tow tune is the safest way for those who tow big, tow heavy, or tow a lot. What's heavy? Over 8,000 lbs and up to your 2019, 2020, 2021, 2022, 2023 Chevy Silverado 4500HD, 5500HD, 6500HD, or International CV515 truck's GVWR (Gross Vehicle Weight Rating). Our fine-tuned calibrations expertly optimize for power, torque, smoke, and vehicle reliability.
- Safely add power
- Custom tire size and speed limiter calibrations
- Improve towing power on grades
As low as $600.00
In stock
Our Heavy Tow Custom Tune
- Emissions Intact – you do not remove your emissions equipment
- Safe for Towing Heavy
- Increase power, not EGTs (Exhaust Gas Temperature)
- Custom “SMART EGT Control” will automatically manage your EGTs
- Air:Fuel Ratio limits built into calibration to limit soot production
- Designed to tow 8,000 lbs – GVW
- Factory turbo brake retains complete functionality
- 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
- Low speed trailer maneuvering
- Custom Tuning from DuramaxTuner.com
- 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 team that actually answers the phone!
Who Benefits from this Tune?
- Over-the-road driver or tows things for living
- Large boat owners
- Pulls construction equipment
- Welding rig with lots of added weight
- Need to tow in the toughest situations
- Tow trucks and heavy service trucks
- Tows 10,000 miles or more every year
- Tows through hills, mountains and inclines
- You can use this to tow lighter, but you'll get slightly better MPG with our Light Tow tune
- Better yet, get all five of our custom tunes with Switch on the Fly
Required Options
Modified ECM Purchase (Engine Control Module)
- We stock modified ECM hardware and ship directly to you
- Remove your factory ECM and replace with our Modified ECM
- Flash our custom tunes using the RTD Hardware and required HP Tuners Credits
- Ship us your factory ECM; we will refund you $1,000 when confirmed in working order
RTD Hardware by HP Tuners
- Connect > Read > Edit > Write > Drive.
- Equipped with Bluetooth®, Proprietary Expansion Port, and Mobile Device Support
- Makes it faster and easier to read, edit, and write your vehicle’s software.
- VCM Editor and VCM Scanner and programming/USB cables, making up the essentials of VCM Suite - one of the most powerful and inclusive scanning, diagnostic, logging and calibration products on the market.
- Full support for our latest rendition of Track Addict - the fastest scanning, logging and data transmission rates to ensure you capture everything.
- VCM Scanner, the most powerful and comprehensive scan tool on the market.
- View, chart, and log diagnostic data in real-time via the OBDII diagnostic data port.
- View and clear Diagnostic Trouble Codes (DTCs) along with other vehicle module information. Command control functions like a closed loop, fans, gear select, timing, air-fuel ratio and so much more all in real-time.
HP Tuners Universal Credits
- 8 credits required for ECM tuning
Transmission Tuning
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10-Speed Allison Transmission for 2020+ L5D Duramax
Extra attention has been invested to develop our engine tuning for L5D’s with the 10-Speed Allison. Currently, there is no TCM Tuning available for these transmissions. However, we 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.