Thread: Help with patching fw for nuvi 55 and backing up it's NV.

Originally Posted by Giomen

Happy to you too!

All you need is gupdate.gcd in .System folder! The nuvi55_56_450.gcd is the same gupdate.gcd for you if you have version of 4.50 of SW in your device. [B][COLOR="#FF0000"]Do not have it - it is not problem... .........

Thanks!!

I was gifted with the NUVI 55LM a few days ago. I would like to install with a few unlocked maps in it.
Its SW is 4.50. Since there is no gupdate.gcd, as you guided, I have downloaded nuvi55_56_450.gcd successfully.

From here, how could I apply the universal patcher? I am a bit scared to do it without backup my new Nuvi which is also very difficult to do.
Where can I put nuvi55_56_450.qcd file? It will be located in a .system folder? After applying the patcher, do I have rename it to gupdate.gcd or leave it as nuvi55_56_450.qcd?

Your step-by-step instruction would be highly appreciated.
Peace.

Originally Posted by Neil

G'day bluemoon, Happy New Year to you too and welcome to GPS Power.
........

Thanks, Neil!

I just got that device a few days ago. I have updated it with GE, and its SW is 4.50 now. It has RWFS Settings also.

Where could I find nonvol file later on? Perhaps, where are the folders: region 154 or regins 41?

Thanks for your assistance. Peace.

Originally Posted by catymag

How to backup Nuvi NV (region41/154) with sd

To make the NV backup with sd:
.................

Hi, Catymag! You are a genius...
I want to back up my new nuvi 55LM before applying a patcher.
I tried to follow your instruction without any pre-knowledge about nuvi system.

I am stuck at the stage 4. "4-In the above folder copy Ldr.bin . What is Ldr.bin? It is your firmware boot.bin you can extract with RGN_tool"
Where can I find boot.bin file? I could not find it in .system folder.
In J:\.System\ExtData, I can only see 006-D4511-01 (to 08).bin files. And in J:\.System\Diag, there is a sys_log2.bin file. That's all.

If you could help me to tackle this, I would appreciate it very much. Peace...