Bully Dog Light Duty Update Agent Access

Power the device via a USB cable or by connecting it to your vehicle’s OBDII port. Exit USB Mode:

Antivirus or firewall blocking the application. Solution: bully dog light duty update agent

Hit "Ctrl + F" for these three signs:

Plug the tuner back into your OBD2 port and follow on-screen prompts to update the vehicle. Power the device via a USB cable or