you need to update your map
Purchase your map updates (if necessary). You can purchase map updates for your Garmin Nuvi from the Garmin website. There are two basic options: a lifetime purchase or a one-time upgrade. The lifetime purchase gives you access to any new updates for the life of your device, while the one-time upgrade will provide you with the latest current maps, but you'll need to purchase again if you want to upgrade again later.
Make sure to log in with your myGarmin account before purchasing the map upgrade.
Connect your Garmin Nuvi to your computer via USB cable.
Open the "myGarmin" website and sign in with your Garmin account. Make sure to sign in with the account that you've purchased the map updates on.
Click the "myMaps" tab on the myGamrin dashboard. This will load a list of all of your purchased map upgrades.
Click the drop-down menu in the "Recent Map Purchases" section. Select your Garmin Nuvi from the list of devices.
Install the Garmin Communicator Plugin when prompted. This is required in order for the Garmin website to transfer the map files to your Gamrin software on your computer.
Download and install Garmin Express. This is the program that allows your computer to interact with your Garmin Nuvi.
Register your device in Garmin Express. If you haven't already registered your device, you'll be prompted to when you start Garmin Express. You'll need to register in order to update the maps.
Click the "Updates" tab in Garmin Express. This will show all of the available updates for your Nuvi, including the new map update you just purchased.
Click the "Show Details" option next to your Map Update. Click the "Install" button that appears. You will need to accept the agreement before the update installs.
Wait for the maps to download and install. Once you agree to the terms, the map update will begin downloading to Garmin Express, and will then be transferred to your Nuvi. This will likely take several minutes to complete.
unplug the Nuvi when the update is complete. The Nuvi will reboot and begin installing the updated software on the device. This may take another couple of minutes.
You can download garmin express here