To update your GPS maps different updates you need to connect Garmin device to your computer with USB cable. Your PC will automatically recognize Garmin NUVI or other device which you like to update. There will be a small icon as a indication that your device is connected.
GET GARMIN COMMUNICATOR PLUGIN
To update maps in your Garmin devices go to Garmin’s website. It will prompt you to install software known as Garmin Communicator. Garmin Communicator creates a interface between devices and Garmin’s website for latest software updates.
After installing Garmin Communicator, it prompts you to reboot your computer.
After rebooting, click on the Garmin Agent icon in your system tray. You can see your NUVI model on screen.
Garmin dashboard let you know if your device needs any update. Also it provides you Firmware updates if available.
CHOOSE MAP PACKAGE
Most of Garmin devices come with free update once. This update must be done within one month after you purchasing device. There are some new models in market that comes with free quarterly map updates.
You can choose purchase plan as per your needs. Lifetime free update plans also available for you.
Once when you choose your maps, go to map download page. There will be product keys for your paid maps. Once when you ready for new updates, click on the blue download button for new maps.
DOWNLOAD AND DONE
After all the above instructions, start downloading maps to your device or external SD card. Sometimes it could take several hours but if you have high speed connection than it would take not more than one hour.