17-21 GM Duramax L5P HP Tuners SOTF Switch

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  • Regular price $79.99

Change maps at the turn of a switch.Diesel Switch

Diesel Switch by HP Tuners lets you power up from a stock calibration to one of five custom maps with the turn of a switch. Pair with HP Tuners Switch on the Fly OS for complete control and performance.

Diesel Switch features:

  • 5’ OBDII pass-through cable
  • Knurled aluminum switch knob and position dial
  • Six-position rotary switch

There are many possible mounting solutions for the Diesel Switch in your truck’s cabin. HP Tuners offers two OBDII port brackets as an option to conveniently install your Diesel Switch. Download files to 3D print brackets for easy integration.

Switch on the Fly (SOTF)– GM L5P Applications

HP Tuners is proud to offer the world’s first integrated ECM map-switching solution for the GM E41. This custom Operating System (OS) code modification is available for 2017+ Chevrolet/GMC trucks with the 6.6L L5P. SOTF can store the stock calibration plus five additional maps at the same time. Keep your hands on the wheel and select your map with the OEM cruise-control buttons too. Change maps on the fly without stopping to re-flash your ECM.


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