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

@tomigonzo
Best option for 3760 is to convert to 3490 to give more and better features, but if you experience [Only registered and activated users can see links. ] then you can simply enable 3D buildings [and 3D terrain, also ASR] by patching 37x0 firmware using turboccc's built-in patcher of RGN_Tool: [Only registered and activated users can see links. ]. A recent post in that thread indicates that it still works with latest 37x0 V5.00 fw.

Thx Guys,

i would like to use only the 3D building (and terrain) feature in my 3760,
it seems like that the Neil's option should be enough and easier way to me, to patch only my 3760.
I just have to look a pc/win to do it :DDDDDDD

one question more: the 3D terrain option is a feature (or the 3dgmap ing is included it?) or i have to use any special map file for it?

You need unlocked gmap3d file for 3D buildings and gmapdem file for 3D terrain (DEM maps are unlocked by default) but if you want to use the features in Aruba it may not have any 3D map coverage.
[Only registered and activated users can see links. ]
[Only registered and activated users can see links. ]

Flash with this pack in pre boot and you will have enabled 3D, ASR, 3D terrain on your device

Spoiler: Enable 3790 feature on 3760

[Only registered and activated users can see links. ]

what i have to do with this file? (it is unpacked, have i copy the sd card root and start the garmin with this card, haven't i?)

RGN Tools:
1:rgn tool';s read me file said: "to start your GPS
in service/pre-boot mode" , i tried two different method (1., to hold the power button, and 2., touch the right bottom corner of the screen and hold the power) but nothing,

2: i backup the remote sw folder with two gcd files, it is ok????

In first post of this thread you have tutorial how to go in pre boot on your device and also how to use updater and rgn file.

This should work for you, but it's untested as i don't have a 3750/3760 to try it. I've converted the patched rgn file to a gcd file and changed the Software Version to 501 from 500 which should allow you to update via microSD card.

Spoiler: Download and Step by Step instructions

1. Connect your 3760 to a PC and look in .System folder for a file named GUPDATE.GCD. If it's there delete it. It may be there or not depending on how you last updated the firmware. [If you can't see the hidden .System folder, go to Folder Options in Control Panel, select 'View' and then select the radio button next to 'Show hidden files, folders and drives'].

2. Extract Garmin.rar onto a CLEAN and otherwise empty microSD card: [Only registered and activated users can see links. ].

3. Ensure the unit is CHARGED and is fully OFF, not on Standby [if in standby, press and hold the On/Off button for several seconds until you get the option to turn it off].

4. Insert the card into the unit and then turn it back on.

If this is successful, on boot you should see 'Loader' appear on the screen after the startup Logo. Leave the unit complete the update and then remove the card. You should then have the additional features enabled.

IMPORTANT: Before you do any firmware flashing ALWAYS backup your nonvol region 41 [see first post for link to tutorial]. Make files back up of the internal memory and then clear nonvol also as per guide in post #1 . Do that again after the flash as well.

@tomigonzo

In first post is writen how you enter in pre boot mode ( where you must add finger on screen ), so first look picture in first post for pre boot.

Now open updater.exe in pack that i send you and add dot beside usb

Now connect device to Pc and add finger in left uper corner of screen OR little abow letter G and you will see in updater window beside USB your device
now click on button OK and whait that procedure is over

When update is finish your nuvi will turn off and back on again and you will have enabled feature on your device.