2017-2023 Duramax MPVI3 w/ GDP Custom Tuning

Fits

*IMPORTANT*

You MUST order CAN Plug for your year range

Each option comes with the MPVI3 Device & 8 Credits

If you're going to get custom tuning for your Duramax, you want to make sure you get tunes from one of the best; let us know what your upgrades and preferences are, and then we will have the tunes written to accommodate any modifications your truck may have. 

Part Number: GDP403CS/ GDP403CS-NOCOMP

• Single Tune, SOTF, or Multi-Tune 
  
• Written specifically for Your Truck
• Emissions On or Off 
• 4 credits is enough to flash your ECM & TCM

What is Tuning?

By custom tuning a truck, you are given the ability to modify countless parameters to the engine and transmission operation that OEMs had to produce the stock tunes you started with. The number one reason customers choose to tune their trucks is fuel economy.

Just by changing the rate of the burn inside the combustion chamber and removing EGR gases (if applicable) from the burn we can extract more energy out of the fuel than was otherwise possible. By extracting more energy out of the fuel we get increased fuel mileage as less fuel is required and an increase of power.  

SOTF Tuning

When selecting SOTF tuning, you have the ability to utilize the Cruise Control Method (Read More Here) which would be accessed via your steering wheel. If you prefer a manual toggle switch, be sure to select the addon. If you do not select the addon, your SOTF tuning will automatically default to the Cruise Control Method. 

Different power levels can be written under request and/or depending on modifications to the vehicle. As all tune files are custom; this will give you a general idea of what you could or can get.

• Level 1 0 HP
  
• Level 2 50 HP
  
• Level 3 80 HP
  
• Level 4 125 HP
  
• Level 5 180 HP

Shipping Your ECM

If you have selected to send in your ECM, you can send it to us here at: 

Unit 6 - 1060 Stevens Road

West Kelowna, BC Canada

V1Z1A3

Click here to view MPVI Tuning instructions

L5P ECM Unlock Methods