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Fish Tuning DSP5 Switch - 11-16 GM Duramax

Thoroughbred Sku #: FISFTDSP5LML
Manufacturer Sku #: FTDSP5LML

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This is the switch used by most tuning companies. If you have MotorOps or Calibrated Power, this switch ONLY works for 2011-2012 year models. If you have a 2013-2016 and are running MotorOps or Calibrated Power, you will need this switch.

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Product Details

Product Name: Fish Tuning DSP5 Switch
Manufacturer: Fish Tuning
Manufacturer Part #: FTDSP5LML
Thoroughbred Diesel Part #: FISFTDSP5LML
Fitment Notes: Fish Tuning DSP5 Switch - 11-16 GM Duramax LML - DSP5LML

EFI Live Tuning by Fish Tuning
Fits: 11-16 Duramax LML

The DSP5 Switch for your GM 6.6L Duramax works in conjunction with EFI Live Tuning. With the DSP5 switch, you can change your tuning "on-the-fly". Tuning not included, you must have DSP5 Tuning for use with this switch.

  • For Use With DSP5 Tuning
  • Includes Needed Components For Installation

Note: This will work for both the Motor Ops EZ Lynk AutoAgent 2.0 Competition Tuner w/ELD Support & GDP Tuning EZ Lynk AutoAgent 2.0 Competition Tuner w/ELD Support.

Reviews

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  • Am I supposed to use pin holes 27 and 46 for my 2013 LML Duramax? I am being told to use 11 and 35 but also been told to use 11 and 48.

    nick graves | 8/4/2025

    Install Pin 11 and 35.

  • 2015 LML duramax what are the PIN numbers the the switch go’s into. Thanks Eric

    Eric Ward | 5/19/2023

    For 2013 to 2016 trucks locate pin 27 and 46

  • I have kory willis ppei tuning. What pins for 2011 lml and 2014 lml for the dsp5 switch? Thank you

    Roger nelson | 1/13/2023

    27 and 46

  • what pins for 2015 lml

    Jake Cocroft | 5/6/2022

    #11 and #35.

  • what pins for 2013 lml

    BRIAN CARTER | 4/12/2022

    Pin 11 and 48

  • Would this pin into the harness closest to the firewall out of the three?

    Vincent Alexander | 3/4/2022

    Yes

  • I have a 13 LML with PPEI EFIlive tuning by Kory Willis. Will this switch work with my tuning?

    Brett | 9/11/2021

    Yes. if you have SOTF tuning.

  • I am going to run this on a 16 GMC 2500, I have it tuned with efi live and have the switch but do not know where the pins get put in. What pins do the wires go to and which connector on a 16 GMC LML

    David Kaczmarek | 7/28/2021

    2016 trucks locate pin 27 and 46

  • You have this listed under the 2016 Cummins section but it is labeled for 2011-2016 duramax. Will this work on a 16 cummins 3500?

    caleb fowler | 7/24/2019

    No you will need part# FISCSP5
    https://www.thoroughbreddiesel.com/csp5/

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