You can find the chip tuning file for your GMC Sierra 1999 - 2007 6.0 V8 360hp 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 1999 - 2007 6.0 V8 360hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 360 HP to 380 HP, 525 Torque to 545 Torque.