Re: How do I change my map directions from vz maps back to google maps on the LG G3
If the icon is on the homescreen, just delete it, then drag the Maps icon from the app drawer to the homescreen.
If you're talking about an icon in the app drawer, there should be one for VZ Maps (in the Vs) and one for Maps (in the Ms). Pressing the Maps icon should bring up Google Maps. (If pressing the Maps icon in the app drawer brings up VZ Maps, something went wrong in the name and icon, and you'll need more help.)
Clearing the default matters when you do something other than directly running an app that requires an app to run. IOW, if you have a map, and pressing its icon runs the default map app, changing the default map app will change what running the map itself runs. But running VZ Maps or Maps will run that app, not another one. The default doesn't matter in that case.