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City Navigator North America NT 2025.10 FID 12328

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  1.     
    #31

    Default 2025.10 install for GVN 54

    I'm trying to update the maps for the Garmin GVN 54 GPS that is in my 2014 Aston Martin Vantage. With the help of the forums, I was able to update them to 2023.10 but the same process I used for that isn't working for the 2025.10 update. Basically, I downloaded the Canada/USA East map available from this thread, unzipped it to a file named gmapprom.img file, run that file through Garmin Unlocker Alternative with a seemingly successful result, then rename the file to gmapsupp.img and put that file onto an SD card with a FAT32 filesystem in a folder named Garmin. Unfortunately, the GPS doesn't seem to see the file, so it defaults to the original 2013 maps that came with the car. Fortunately, I did this on a SD card separate from the one with the 2023 maps so I'm still able to put that SD card back in and use them. I've tried different cards, but with the same result. Can anyone suggest what I might be doing wrong?

  2.     
    #32
    Garmin Mod
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    Garmin_Nuvi's Avatar
    City Navigator North America NT 2025.10 FID 12328
    Quote:
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    Try using gimgunlock on the map you downloaded.
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    In the garmindevice.xml from an AM from Europe I have I don't see any mention of supplemental maps (gmapsupp.img) check to see the path & name in your garmindevice.xml
    Garmin say 8Gb maximum SD card size so check that.



    <PartNumber>006-J0183-1K</PartNumber>
    <SoftwareVersion>610</SoftwareVersion>
    <Description>CTP16</Description>

    </Model>

    <Id>3987654321</Id>
    <MassStorageMode>

    <DataType>
    <Name>BaseMaps</Name>
    <File>
    <Specification>
    <Identifier>IMG</Identifier>

    </Specification>

    <Location>
    <Path>Garmin</Path>
    <BaseName>gmapbmap</BaseName>
    <FileExtension>img</FileExtension>

    </Location>

    <TransferDirection>InputOutput</TransferDirection>

    </File>


    </DataType>

    <DataType>
    <Name>PreProgrammedMaps</Name>
    <File>
    <Specification>
    <Identifier>IMG</Identifier>

    </Specification>

    <Location>
    <Path>Garmin</Path>
    <BaseName>gmapprom</BaseName>
    <FileExtension>img</FileExtension>
    <Extensions>
    <dtlxataTypeLocationExtension>
    <dtlx:ExternalPath>Garmin//</dtlx:ExternalPath>

    </dtlxataTypeLocationExtension>


    </Extensions>


    </Location>

    <TransferDirection>InputOutput</TransferDirection>

    </File>


    </DataType>

    <DataType>
    <Name>TimeZoneMaps</Name>
    <File>
    <Specification>
    <Identifier>IMG</Identifier>

    </Specification>

    <Location>
    <Path>Garmin</Path>
    <BaseName>gmaptz</BaseName>
    <FileExtension>img</FileExtension>

    </Location>

    <TransferDirection>InputOutput</TransferDirection>

    </File>


    </DataType>

    <DataType>
    <Name>PreProgrammed3DMaps</Name>
    <File>
    <Specification>
    <Identifier>IMG</Identifier>

    </Specification>

    <Location>
    <Path>Garmin</Path>
    <BaseName>gmap3d</BaseName>
    <FileExtension>img</FileExtension>

    </Location>

    <TransferDirection>InputOutput</TransferDirection>

    </File>


    </DataType>

    <DataType>
    <Name>PreProgrammedDEMMaps</Name>
    <File>
    <Specification>
    <Identifier>IMG</Identifier>

    </Specification>

    <Location>
    <Path>Garmin</Path>
    <BaseName>gmapdem</BaseName>
    <FileExtension>img</FileExtension>

    </Location>

    <TransferDirection>InputOutput</TransferDirection>

    </File>


    </DataType>

    <DataType>
    <Name>PreProgrammedLaneAssistPortraitFull</Name>
    <File>
    <Specification>
    <Identifier>JCV</Identifier>

    </Specification>

    <Location>
    <Path>Garmin/JCV</Path>
    <FileExtension>jcv</FileExtension>
    <Extensions>
    <dtlxataTypeLocationExtension>
    <dtlx:ExternalPath>Garmin/JCV/</dtlx:ExternalPath>

    </dtlxataTypeLocationExtension>


    </Extensions>









    Last edited by Garmin_Nuvi; 14th May 2024 at 04:16 AM.
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    tp2168 (14th May 2024)

  4.     
    #33
    Thanks for the suggestions but despite trying them all it's still not working. I'm sure gmapsupp.img is the correct file name - that's what's used on the version that is working. I also tried leaving the file name as it was (gmapprom.img) with the same result. Something is going on where the GVN 54 is just not seeing the file.....

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    City Navigator North America NT 2025.10 FID 12328
  6.     
    #34
    Hello, I have converted the gmapprom.img file to mapsource with gmaptooll and cGPSmapper and it also gives the same error as in the direct file for mapsource, not allowing it to be loaded into the GPS and search for a site.
    Is there a way to solve it?
    I have seen that it mentions in #25 to change the location of the program1 folder, could you explain it in more detail? since I entered it in the city one... and it doesn't open the map.
    Thank you.

  7.     
    #35
    Garmin Mod
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    Garmin_Nuvi's Avatar
    City Navigator North America NT 2025.10 FID 12328
    Quote:
    Only the registered members can see the QUOTE Contents. Please Login OR Register.


    Link URL:
    Only the registered members can see the Link URLs. Please Login OR Register.
    Unless you are a "New" member, having used the Thanks button regularly is the quickest way to get help.

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    kleobis (24th May 2024)

  9.     
    #36
    Hi, thank´s.
    Now I understood. I´ve looked "inside" file product1 and I´ve founded the respective file.

    Thank´s.

  10.     
    #37
    Quote:
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    What does that file do??
    I greatly appreciate the upload but us old noobs can be challenged when trying to figure out what each of your files do

  11.     
    #38
    Garmin Mod
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    City Navigator North America NT 2025.10 FID 12328
    Quote:
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    Please try using the "search" at the top of the page before posting
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    Link URL:
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    MajBach (6th June 2024)

  13.     
    #39
    d9644070a.img doesn't work on my Nuvi 1490T. I put it and gmapsupp.img (renamed gmapprom.img) under garmin folder in SD. There is only one map "ALL US" in Map info.

  14.     
    #40
    Garmin Mod
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    City Navigator North America NT 2025.10 FID 12328
    Quote:
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    gmapprom.img is the name if the .img is in the device storage.

    On an SD card create 2 folders Garmin & Map

    Map/gmapsupp.img
    Map/gmapsup1.img
    Garmin/JCV/D9677040A.jcv
    Garmin/JCV/D9678040A.jcv

    Check your garmindevice.xml this shows you the naming protocol and location of where the files go



    <Name>PreProgrammedMaps</Name>
    <File>
    <Specification>
    <Identifier>IMG</Identifier>
    </Specification>
    <Location>
    <Path>.System</Path>
    <BaseName>gmapprom</BaseName>
    <FileExtension>img</FileExtension>
    </Location>
    <TransferDirection>InputOutput</TransferDirection>
    </File>
    </DataType>
    <DataType>
    <Name>
    SupplementalMaps</Name>
    <File>
    <Specification>
    <Identifier>IMG</Identifier>
    </Specification>
    <Location>
    <Path>Map</Path>
    <BaseName>gmapsupp</BaseName>
    <FileExtension>img</FileExtension>
    </Location>
    <TransferDirection>InputOutput</TransferDirection>
    </File>
    </DataType>
    <DataType>
    <Name>NMaps</Name>
    <File>
    <Specification>
    <Identifier>IMG</Identifier>
    </Specification>
    <Location>
    <Path>Map</Path>
    <FileExtension>img</FileExtension>
    </Location>

    Last edited by Garmin_Nuvi; 5th June 2024 at 04:58 AM.
    Unless you are a "New" member, having used the Thanks button regularly is the quickest way to get help.

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    great (5th June 2024)

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