You can find the chip tuning file for your GMC Sierra 2017 -> 6.6 V8 445hp vehicle on our site. These files are created especially for you and handed to you. All our Tuning files are extensively tested on Dynometer. The development of the tuning file for your GMC Sierra 2017 -> 6.6 V8 445hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 445 HP to 500 HP, 1234 Torque to 1350 Torque.