2017-2023 L5P + HP Tuners ECM Upgrade Walkthrough

*NEW VERSION BELOW*

https://youtu.be/j0Mt0TMnD4k

In this video we give you a quick walkthrough on how to upgrade your L5P ECM using the HP Tuners E41 ECM Upgrade kit.

#hptuners #runvse #duramaxdiesel #duramax #gmc #chevrolet #dieseltrucks