We're excited to present a custom tuning package for the 2017 - 2019 GMC/Chevrolet L5P with 6.6L Duramax engine from Coopers Custom Solutions (CCS). This package includes the MPVI3 device, 5 custom CCS tunes, and a CAN Control Harness. You can choose between emissions on or off, and TCM tuning is highly recommended. Power levels range from stock delete up to +120HP, and higher levels are available with proper supporting mods. Each package comes with all necessary equipment and credits to load the custom tuning. Plus, you'll have full access to calibrate, log, and scan via the OBD2 port. Optional TCM tuning and unlocked TCM are also available. Note that you'll need to select an add - on for ECM unlock, and unlocked ECMs won't work with GM factory tools. Installation is quick and easy with step - by - step instructions.

Using this custom tune package is straightforward. First, use the HPTuners MPVI3 device to read the stock file of your truck. Then, send this stock file to us, and we'll send you the custom tuning that suits your truck. Make sure to follow the step - by - step instructions provided. When it comes to power levels, start with a lower level if you're not sure. If you want higher power, make sure you have the proper supporting modifications. For TCM tuning, it's a great addition if you have the T87 TCM as it helps hold the extra power. When selecting SOTF tuning, you can choose the cruise control method accessed via your steering wheel, or you can add a manual toggle switch. Remember, you need to select an add - on for ECM unlock, and once your ECM is unlocked, GM won't be able to flash or modify it for recalls. Keep your MPVI3 device clean and stored in a dry place to ensure its longevity. If you have any questions during the process, don't hesitate to reach out to us.