Updating garmin map
As this may not be compatible due to increased data file size.
Please ensure your units software is up-to-date before purchasing the new mapping.
If you've purchased one of Garmin's many GPS units that offer free map updates, you will choose this map updates page, which will prompt you to download and install the Garmin Express map updater utility, if you don't already have it installed.
Follow the instructions to get Garmin Express running on your machine.
You can download free Garmin map updates if: The process of using the nu Maps Guarantee offer is very simple.
On the Garmin site, in the Update Maps section make sure you choose the option labelled nu Maps Guarantee.