Thread: Firmware for GTM 70 Digital Traffic Receiver up to version 2.30

Originally Posted by SavaSnoo

Okay guys used Zippy Share and the link is below

[Only registered and activated users can see links. ]

If anyone gets it reverted would be pleased to know the steps to follow; otherwise I will get hold of Garmin Support on Monday

Did you try to downgrade your unit FW and then update it back to latest FW?

p.s.
With gcd for type 3 Angelo and i play with gcd but can't find thread where angelo write complet procedure, maybe Angelo or Caty can find this thread or maybe Angelo can modiffy your gcd and then you can try repair GTM.

I know that your nuvi work OK, but we repair problem with GTM when user downgrade Firmware of nuvi to previous version.

Downgrade your nuvi FW from 4.40 to 4.30 or some more old FW and after downgrade try if GTM will work or not.
Then use webupdater and install back FW 4.40 for your device but Don't upgrade GTM FW.

Originally Posted by lolypop000

maybe Angelo or Caty can find this thread or maybe Angelo can modiffy your gcd and then you can try repair GTM.

Angelo's post is here: [Only registered and activated users can see links. ]
I added it in Tutorial Index for faster search

DON'T use pack that Angelo post in thread from Caty link becouse this is different pack.
I will conntact Angelo and let him know about this thread, mayne he remember procedure to create GTM downgrade pack, becouse i can't remember anymore
sorry.

It may well be that the NA GTM60 and EU GTM70 run the same firmware but I wouldn't have thought so. My NA 3597LMTHD [supplied with GTM60] and a friend's AU 3597LM [supplied with FM only GTM3x] both have the file 006B154600.gcd since purchase and those 2 files are identical.

But here's the thing, also identical with them is the file uploaded by SavaSnoo which is from his EU unit with GTM70. I've found references to both 'HD Radio' for NA and 'DAB' for EU in those 3 files in clear text.

However, the file direct from Garmin named FirmwareUpdateforGTMxxDigitalRadioTypeS_230.gcd does have the same size as the above 3 x 006B154600.gcd (1,052,844 bytes) but its hashes are different and on a quick hex check it seems that the file in the Garmin download maybe is encrypted.

Originally Posted by gette

Ok, thanks, removed that file now...

and now "garmin express" is asking me to update again ;-)

Please check your garmindevice.xml file to looking for B1546

It must be like below:

Code:

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After successful update garmindevice.xml must contain current version for moment. PC SW does not read file version from files but only from garmindevice.xml which generated by device after scan internal info and files.