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Tompkins Diesel Solutions

2017-2023 Duramax HP Tuners Tuning

2017-2023 Duramax HP Tuners Tuning

$1,500.00 CAD
$1,500.00 CAD
Sale Sold out
Power Level

Take full control of your 2017–2023 Duramax L5P 6.6L with Tompkins Diesel custom tune files, featuring Switch-On-The-Fly (SOTF) tuning controlled directly from your steering wheel cruise control buttons.

Whether your truck is a daily driver, dedicated tow rig, or max-effort build, there’s a power level designed to match exactly how you use it.

Key Benefits

  • Instant power adjustments using cruise control buttons
  • Significant horsepower & torque gains
  • Improved throttle response
  • Lower exhaust gas temperatures (EGTs)
  • Enhanced drivability and towing performance
  • Safe, refined, and reliable custom calibrations

Available Power Levels

Optimized Stock
Refined factory calibration with smoother power delivery and reduced EGTs.
  • +15 RWHP +10 ft-lbs
Heavy Tow
Built for towing 8,000 lbs up to GVWR with lower exhaust temperatures.
  • +90 RWHP +120 ft-lbs
  • Up to 100°F lower EGTs under load
Light Tow
Perfect balance of towing capability and sporty drivability.
  • +110 RWHP +200 ft-lbs
Street
Responsive and aggressive tune for unloaded daily driving.
  • +150 RWHP +350 ft-lbs
Race / Max Effort
Maximum performance pushing the factory turbo to its limits.
  • +200 RWHP +480 ft-lbs

📦 Tune Packages

  • Single Tune: One custom calibration tailored to your chosen power level
  • SOTF 5 Tunes: Instantly switch between five power levels on the fly

Optional Transmission Tuning

Available transmission tuning increases line pressure, improves torque converter lockup, and refines shift timing and schedules—critical for handling added power and maintaining long-term reliability.

Important Notes

  • 2017–2018.5 L5P: Requires HP Tuners unlock cable for initial ECM unlocking
  • 2019–2023 L5P: No unlock cable required
  • Transmission tuning is strongly recommended for higher power levels

Built for Serious Duramax Performance

No weak factory calibrations—just real performance, precise control, and serious power for Duramax owners who expect more from their truck.

*For off-road use only. Supporting modifications may be required for higher power levels.

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