Discover the ultimate custom tune package for your 2017 - 2019 GMC with a 6.6L L5P Duramax engine. AMDP Custom Tuning unlocks your L5P's true potential, offering tune files from Stock Delete to 150HP Race tunes. We can even create custom tunes for your modified truck. Each package includes an HPTuners MPVI3, 8 credits to flash the ECM, single or 5 custom tune files, and a Canbus Harness. Optional transmission tuning is available. Power levels range from 0HP to 150HP when emissions are off. The MPVI3 comes with powerful features for scanning, diagnostic, logging, and calibration. You'll need an ECM unlock product (not included), and installation is quick and easy with step - by - step instructions. Note that unlocked ECMs won't work with GM Factory Tools.

Using this custom tune package is straightforward. First, read the stock file of your truck using the HPTuners MPVI3 Device. Then, send us the stock file, and we'll send you the custom tuning that suits your truck. The process comes with step - by - step instructions. For SOTF tuning, you can use the Cruise Control Method via your steering wheel, or you can select the add - on for a manual toggle switch. When it comes to maintenance, keep your MPVI3 clean and store it in a dry place. Be aware that the unlocked ECMs won't be able to communicate with GM Factory Tools, so GM won't be able to flash or modify your ECM for recalls anymore. If you have any questions about the power levels or optional add - ons, just let us know.