nuvi 37xx (GCD File) software version 4.90 as of May 17, 2012
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    15 years
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Source: http://www8.garmin.com/support/download_details.jsp?id=5063
Change History
Changes made from version 4.80 to 4.90:
Fixed a bug that caused the device to reboot at certain locations in Ecuador.
Made a change so that Topo/Recreational and City Navigator Maps cannot be enabled at the same time.
Fixed a bug that caused incorrect letter capitalizations.
Changed the default TTS voice for Dutch language when the locale is Belgium.
Fixed a Czech translation bug.
Fixed some ASR-related bugs.
Changes made from version 4.70 to 4.80:
Updated to comply with France Safety Camera decree.
Fixed a bug that caused the device to lose turn information while recalculating a route when near a junction.
Fixed a bug that caused the unit to freeze when receiving traffic information from a GTM36 cable.
I'll give it a try but not
I'll give it a try but not before I save the current .gcd file. Just in case if I have to go back to 4.80
May want
May want to hold off on this update if you have any plans on using topo or other maps other than City Navigator.
See this:
"Made a change so that Topo/Recreational and City Navigator Maps cannot be enabled at the same time."
YES THAT DOES SAY YOU CANNOT ENABLE TOPO AND CITY NAVIGATOR MAPS AT THE SAME TIME!
Nuvi 350, 760, 1695LM, 3790LMT, 2460LMT, 3597LMTHD, DriveLuxe 50LMTHD, DriveSmart 61, Garmin Drive 52, Garmin Backup Camera 40 and TomTom XXL540s.
did 4.90 update & still wil navigate with the topo lines showing
May want to hold off on this update if you have any plans on using topo or other maps other than City Navigator.
See this:
"Made a change so that Topo/Recreational and City Navigator Maps cannot be enabled at the same time."
YES THAT DOES SAY YOU CANNOT ENABLE TOPO AND CITY NAVIGATOR MAPS AT THE SAME TIME!
I did the 4.90 update on my 3790LMT and when I go to my maps and enable the Arizona topo map it shows the topo lines on the the City Navigator Maps and it will still navigate with the topo lines showing.
Garmin Drive Smart 55 - Samsung Note 10 Smartphone with Google Maps & HERE Apps
Good
Good to know as I only use the California and Arizona Topo maps. Wonder what Garmin is taking about, maybe just their own Topo maps.
Nuvi 350, 760, 1695LM, 3790LMT, 2460LMT, 3597LMTHD, DriveLuxe 50LMTHD, DriveSmart 61, Garmin Drive 52, Garmin Backup Camera 40 and TomTom XXL540s.