Are your GPS maps current? or at least not over a year old?
If your GPS came with the “LM” designation then you are entitled to Lifetime Maps updates [so be sure to update often].
If you have to PAY for your updates, there are several places to get em for less.
I have a Zumo 660 and just got the 2019 North America maps for it for $25 delivered on a chip
from an Ebay seller [ search for ITEM 183143534684 ]
Another seller I get email from has the maps for $15 each or 2 for $25 (get with a buddy to save) email mapmax10@gmail.com for details.
And I have just heard of a place to download open source maps for NO CHARGE [have not tried them yet – maybe you have ]
Try them at http://garmin.openstreetmap.nl/
Wherever you get them, keep your maps up to date for your safety and convenience.
Ride Safely, Ride Often