Right-click the downloaded .exe file and select "Run as Administrator." Follow the prompts. When the driver installer pops up (Windows will ask for permission), click "Yes."

Reinsert the SD card into your GT tuner. Power on the device and navigate to the Main Menu . Scroll to the bottom and select Update Firmware (or Update GT Software ) to finalize the process. Troubleshooting Common Issues

Resolves freezing screens, reading errors, or diagnostic trouble code (DTC) reading glitches.