Description: This product is a set of custom tune files for the 2017 - 2023 Chevrolet/GMC HD with a 6.6L Duramax engine. It's designed to work with the GDP Commander device. You must load these files through an HP Laptop, no exceptions. This package only includes the tune files. If you need a Commander device, click here. The GDP Commander is a simple device, similar to an MPVI3 in the load - file process and credit - system use. You'll need 8 credits to flash the Duramax ECM. It plugs directly into your ECM when you buy the harness, enabling easy remote tuning.Features: You can flash the Duramax via Bench Flash using single or SOTF files. You can apply custom tuning from home. There's no need to ship out the ECM, so no waiting! Both single - tune and SOTF options are available.Power Levels: Different power levels can be customized based on your requests and vehicle modifications. Here are some general power - level examples: Level 1 offers 0 HP, Level 2 gives 50 HP, Level 3 provides 80 HP, Level 4 offers 120 HP, and Level 5 gives 180 HP.Notes: These tune files are only compatible with the GDP Commander. You'll need the GDPE41HRN harness to flash the tune files on the truck. For TCM Tuning, you'll need the GDPL5PUHRN harness to unlock the E41 TCM.

Using the GDP Commander custom tune files is quite straightforward. First, make sure you have an HP Laptop as these files must be loaded through it. If you don't have the GDP Commander device yet, you can click the provided link to get one. When you're ready to flash the Duramax ECM, you'll need 8 credits. Also, purchase the GDPE41HRN harness so you can plug the device directly into the ECM. This will let you do remote tuning right from your home without having to ship out the ECM. If you want to do TCM Tuning, don't forget to get the GDPL5PUHRN harness. As for power levels, you can ask for custom - written levels according to your vehicle's modifications. Just keep in mind that these tune files only work with the GDP Commander. There's no special maintenance required for the tune files themselves, but keep your laptop and the GDP Commander in good working condition. Make sure your laptop has all the necessary software updates to ensure a smooth tuning process.