回答“Garmin automotive device displays the message "No Detailed Maps Found"”Did everything by the book. Formatted the USB drive per guideline from Garmin, got the GarminDevice.xml from the car and able to download the update from Garmin using the newly installed most current release of Garmin Express. I was able to install the update to my car and received a successful message of the installation. But when I tried to use the Where To Address function to specify the destination address, I received a message “Data Map for this vehicle is not available”. I double checked through Settings/Map & Vehicle/myMaps and all maps for North America were already checked. I then went back to Garmin Express to Reinstall the update and after going through the same process as before, the problem remains. I checked the file folders on the USB drive and it appears the download process was successful. Any suggestions?