Thread: Transform a Nuvi 37xx in a Nuvi 34xx for dummies

If you know what you must do then is not problematic
Just folow tutorial in first post.

Planning to convert your nuvi 37xx to 34xx?
Carefully read post #1 and all other posts to have a clear understanding of what's going on.
Thanks a lot for the Tutorial by catymag and all other helpful posts.
Still cannot understand Tutorial in post #1, below is the step by step I did, based of course on post #1
for mine to work.

Conversion of my 3760T to 3490T (Using Win 7 x64)
1. As usual very important first back-up your nuvi.
2. Connect your nuvi in your PC. In .\system\ folder delete the file GUPDATE.gcd
3. Rename folders Voice, Text & Keyboards to whatever name you want, say zVoice, zText ect.
4. Disconnect nuvi safely fr. PC, turn nuvi on, go to volume window, in landscape position
press and hold at the right uppermost part of the screen, it will show the Diagnostics Page,
go to Developer Info --> Nonvol Statistics --> Press the 3 bars menu --> Then Clear Nonvol.
5. Download 34xx firmware from garmin ([Only registered and activated users can see links. ])
6. Download RGN tool from Turboccc site ([Only registered and activated users can see links. ])
7. Open RGN Tool, Drag & drop file (nuvi34xx_GCDFile__440.gcd) to the file drag zone. save it in the
desktop (now the filename is nuvi34xx_GCDFile__440.rgn)
8. Download Garmin Updater v.2.8.0 from the link in post #1 save it in the desktop.
9. Drag the file nuvi34xx_GCDFile__440.rgn to the updater icon it will pop up, now select
connection settings as USB Device.
10. Connect nuvi to the PC it will recognized it as a storage device, safely eject it from
the USB safely remove icon but do not disconnect it physically from the PC.
11. Get it to preboot mode: turn on Nuvi, at starting press & hold the left uppermost part
of the nuvi screen.
12. The Updater will recognized it as USB Device when you'll see your nuvi listed in the updater, press OK.
13. Now the Update will begin. Caution: don't release finger on the screen until the updating
session is finish and the Updater tells you that the update was successfull.
14. Disconnect from PC. restart nuvi, at this point wait a little bit longer as the Garmin logo is missing.
15. When nuvi is turned on you will see nice 3490 screen. Reset nuvi, Go to volume window, in landscape position
press and hold at the right uppermost part of the screen, it will show the Diagnostics Page,
go to Developer Info --> Nonvol Statistics --> Press the 3 bars menu --> Then Clear Nonvol.
16. Restart nuvi select country and language. Go to volume window again, in landscape position
press and hold at the right uppermost part of the screen, it will show the Diagnostics Page,
scroll down go to MTP Settings --> Select mass Storage then save.
17. To be able to see Garmin Logo at start-up,
download link "Logo splash screen for nuvi 34xx hid 1376" from post #1 (file 34xx_350_logo_hid1376.rgn).
save it in desktop.
18. Connect nuvi to the PC it will recognized it as a storage device, safely eject it from
the USB safely remove icon but do not disconnect it physically from the PC.
19. Drag the file 34xx_350_logo_hid1376.rgn to the updater icon it will pop up, now select
connection settings as USB Device.
20. Get nuvi to preboot mode: turn on Nuvi, at starting press & hold the left uppermost part
of the nuvi screen.
21. Don't release your finger for a while. Mine was stuck in this step, the nuvi screen freezes
says software loading. What I did was, I disconnect from PC and Turned on the nuvi after a while the nuvi started
normally with the GARMIN logo.
22.Get all the features availables for your nuvi, you must copy *.xml files in attachment in post #1 in /Garmin
(example /Garmin/DeviceConfig_MP3_Enabled.xml)
23. Restore name of Text, Voice & Keyboards folder.
24. Run Webupdater to update newly converted 3490. Updates are Dashboards and new text files etc.
25. ReStart Nuvi.


The only issue I had was for the voice command.
It says Voice command support is not available for american english.
Anything else is working great!
Any solution regarding this?

Originally Posted by tr3b

.......The only issue I had was for the voice command.
It says Voice command support is not available for american english.
Anything else is working great!
Any solution regarding this?

The ASR files for 3790 are different than those used in the original 3490.
Since you did a backup as 3790, delete everything in .System\ASR\ folder.
Connect with Webupdater and "Proceed to check for additional updates such as voice updates"
Check which language "Speech Recognition Data, xxxxxx ASR" you want to install.
If you choose english only, now in the .System\ASR\ folder you have two files named "en_US.srd" and "en_GB.srd".
Now copy in .System\ASR\ folder, the rest of the "special for the 3490" files depending if you have Europe or North America CN.

For 3760-->3490, you don't delete anything because you didin't have any ASR folder in the device.


___________________________________________________________________

For the ORIGINAL 3490LMT OWNERS:

Copy ALL (all together) *xml files in the attachment in post #1 in Garmin folder, restart Nuvi and you have MP3 and Video Player ENABLED!!!!
Copy them ALL at the same time and NOT only "DeviceConfig_MP3_Enabled.xml" and "DeviceConfig_VideoPlayback_Enabled.xml", because if you just copy only those two, Bluetooth is disabled.
Works for Europe sold 3490LMT.

Originally Posted by luiguy501

Major help needed.

I finally got the courage to flash the garmin 3790t and convert it to 3490t. Followed tutorials to the letter. Firmware flashing achived BUT the flashing the 3490t splash screen was inconclusive. I decided to keep the 3490t firmware installed but wanted to restore the 3790t splash screen.

When i attempted that major fail was the result. The firmware installation halted and froze. All i have is a black screen on the 3790t. Super dissapointed.

Why you didn't read what Neil wrote to you :"you really should not attempt this at all"

Originally Posted by luiguy501

Major help needed.

I finally got the courage to flash the garmin 3790t and convert it to 3490t. Followed tutorials to the letter. Firmware flashing achived BUT the flashing the 3490t splash screen was inconclusive. I decided to keep the 3490t firmware installed but wanted to restore the 3790t splash screen.

When i attempted that major fail was the result. The firmware installation halted and froze. All i have is a black screen on the 3790t. Super dissapointed.

Logo gone when 37xx go to 34xx because of different size of logo.
If you run on 34xx firmware then you need 34xx Logo to be flashed not 37xx logo.bin
The black screen is not the sign of dead 37xx. If you see the light appear on screen after you press power button so it means you can access preboot mode to go back to 37xx firmware.

Same here but it doesn't bother me since it doesn't affect the functionality as 3490.

hello everyone!
Thanks a lot to all of you who used the time to create/feed this thread. I took my time to read attentively to all replies and decided to give my 3790 a shot... Apparently I've been stuck in a "shooting my foot" scenario. I re-read countless times and followed all the instructions, but 2 things came up: 1- I don't have a gupdate.gcd file in my Nuvi's system folder (could it be for having the most recent updates on?), so I have nothing to erase; 2- when I try to install the 34xx fw in my GPS, I hold my finger on the upper left side of the screen and see the small "system loading" info above the garmin logo, but garmin updater v2.8.0 doesn't recognize by USB device... i held my finger for several minutes and tryed countless times to repeat the procedure... If I'm not cleared on what's not going right I'll give up.. Thanks for any help!

Originally Posted by webalf

hello everyone!
Thanks a lot to all of you who used the time to create/feed this thread. I took my time to read attentively to all replies and decided to give my 3790 a shot... Apparently I've been stuck in a "shooting my foot" scenario. I re-read countless times and followed all the instructions, but 2 things came up: 1- I don't have a gupdate.gcd file in my Nuvi's system folder (could it be for having the most recent updates on?), so I have nothing to erase; 2- when I try to install the 34xx fw in my GPS, I hold my finger on the upper left side of the screen and see the small "system loading" info above the garmin logo, but garmin updater v2.8.0 doesn't recognize by USB device... i held my finger for several minutes and tryed countless times to repeat the procedure... If I'm not cleared on what's not going right I'll give up.. Thanks for any help!

1. Don't worry if you didn't find a gupdate.gcd file. It's normal.
2. Make sure Garmin Lifetime updater it's not running in background. Check your USB cable. USB drivers must be installed.