1. Connect your Garmin GPS device to your computer.
2. Save Garmin vehicle files from https://www.gps-data-team.com/pda-gps-navigation/topic/1785.html
3. Click Extract, if necessary.
4. Browse to find the "Garmin/vehicle" folder on the Garmin drive. You may need to create the vehicle folder.
5. Put vehicles in this folder
6. Unplug the USB cable from your Garmin GPS device.