Question about Garmin StreetPilot C330 GPS Receiver

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Garmin 330 can't unlock maps tried to reset unit but this didn't work what do i do next

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The instruction manual is available to download from Garmin's website, www.garmin.com. Click on the StreetPilot C330, then go to updates and downloads. http://www8.garmin.com/manuals/StreetPilotc330_OwnersManual.pdf

http://www8.garmin.com/manuals/StreetPilotc330_QuickReferenceGuide.pdf

Posted on Jun 03, 2008

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1 Answer

Can't unlock maps


Perform a hard reset on the unit.
To perform this, turn the unit off and unplug it if its plugged into a power source. Touch and hold the lower right hand corner of the screen, and while holding here turn the unit on. When prompted to erase user data tap yes and allow the system to restart.

If that does not work you can also try here https://my.garmin.com/maps/unlockMaps.htm

Sep 24, 2011 | Garmin nuvi 1490T GPS Receiver

1 Answer

I tried downloading a map update for a brand new garmin nuvi 1300 and now it says cannot unlock maps and doesn't work. Any quick fix?


These are the instructions for unlocking maps from the Garmin website:

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  1. Log into your myGarmin account1
  2. Select myMaps
  3. Click Manage Maps and Downloads
  4. Below the appropriate device, select the "Details" link
  5. Look for the Unlock Code listed on this page
  6. Copy all the unlock codes for your device
  7. Close your internet browser
  8. Right click on your desktop
  9. Click new, and then click Text Document
  10. Click on the newly created Text Document icon from the desktop
  11. Type your unlock codes into the document
  12. Click File and Save as
  13. Change the file name to gmapprom.unl
  14. Change the “Save as type” to "All files"
  15. Close the document you should see the file gmapprom.unl on your desktop)
  16. Right click on the gmapprom.unl file and then click copy
  17. Connect your Garmin device to your computer and click Computer/My Computer
  18. Click on the 'nüvi (drive letter:)'2
  19. Right click on the Garmin folder and click paste (see next line for nuvi 1xxx series)
  20. For nuvi 1xxx series devices, the gmapprom.unl file is required in the ".System", "Garmin" folder which is a hidden system folder. In order for you to see the hidden system folder:
    • For XP:
      1. In MyComputer go to the Tools menu and choose Folder Options...
      2. Select the View tab
      3. Select the radio button next to "Show hidden files and folders"
      4. Uncheck the box next to "Hide protected operating system files (Recommended)"
      5. Click OK
    • On Vista:
      1. In the Computer window go to the Organize menu and choose "Folder and search options"
      2. Select the View tab
      3. Select the radio button next to "Show hidden files, folders, or drives"
      4. Uncheck the box next to "Hide protected operating system files (Recommended)"
      5. Click Ok
Safely disconnect your Garmin device from the computer to complete the process. If you are having any issues duplicating the steps above or are still receiving the message "Can't unlock maps, your unit will not function without maps” please contact Product Support.
1 The device must be registered to view the Unlock Code.
2 In My Computer, some units may be labeled 'garmin (drive letter:)'.

Aug 07, 2010 | Garmin nuvi 1300 Car GPS Receiver

1 Answer

My maps on my Garmin Nuvi 205w GPs device are lock and I can't use it hoe do I unlock the maps to use my device again?


If you are getting the message “Can't unlock maps, your unit will not function without maps” on your Garmin device, there is an issue with the mapping on your device.
Please follow the steps below to restore the mapping:
  1. Go to www.garmin.com and log into myGarmin account. (If you haven't already registered your satnav you'll need to in order to log in)
  2. Select myMaps
  3. Click Manage Maps and Downloads
  4. Below the appropriate device, select the "Details" link
  5. Look for the Unlock Code listed on this page
  6. Copy all the unlock codes for your device
  7. Close your internet browser
  8. Right click on your desktop
  9. Click new, and then click Text Document
  10. Click on the newly created Text Document icon from the desktop
  11. Type your unlock codes into the document
  12. Click File and Save as
  13. Change the file name to gmapprom.unl
  14. Change the “Save as type” to "All files"
  15. Close the document you should see the file gmapprom.unl on your desktop)
  16. Right click on the gmapprom.unl file and then click copy
  17. Connect your Garmin device to your computer and click Computer/My Computer
  18. Click on the 'nüvi (drive letter:)'2
  19. Right click on the Garmin folder and click paste (see next line for nuvi 1xxx series)
  20. For nuvi 1xxx series devices, the gmapprom.unl file is required in the ".System", "Garmin" folder which is a hidden system folder. In order for you to see the hidden system folder:
    • For XP:
      1. In MyComputer go to the Tools menu and choose Folder Options...
      2. Select the View tab
      3. Select the radio button next to "Show hidden files and folders"
      4. Uncheck the box next to "Hide protected operating system files (Recommended)"
      5. Click OK
    • On Vista:
      1. In the Computer window go to the Organize menu and choose "Folder and search options"
      2. Select the View tab
      3. Select the radio button next to "Show hidden files, folders, or drives"
      4. Uncheck the box next to "Hide protected operating system files (Recommended)"
      5. Click Ok
Safely disconnect your Garmin device from the computer to complete the process. If you are having any issues duplicating the steps above or are still receiving the message "Can't unlock maps, your unit will not function without maps” please contact Product Support.
1 The device must be registered to view the Unlock Code.
2 In My Computer, some units may be labeled 'garmin (drive letter:)'.

Aug 04, 2010 | Garmin nuvi 200W GPS Receiver

1 Answer

I have 2010 maps on a SD card for my Nuvi. Does


If you already have a map on your unit, you will have both maps. You may have to enable the map on the SD card. At the main menu, press the wrench symbol, then the map icon and then "map info". You should see all of your maps that are available to your unit. Make sure that the square boxes next to each map are checked. Thats how you turn on/off (selct) each map. If the SD card map isn't working, make sure it has a unlock code assigned to the map or it won't work on your unit. Also, the map file name on an SD card is different than the name on your unit. - Jim

Jul 21, 2010 | Garmin Nuvi 660 GPS Receiver

1 Answer

Garmin Nuvi 205 can't unlock maps


First, check to make sure the map file is there. The file name is gmapprom.img. It's located in the Garmin directory. It should be 1GB in size. To do this you need to connect the Nuvi to a PC with a USB cable.

Next, please tell me what year of map you have on your unit, 2009, 2010, etc.

Them, email me your units internal serial number. Its a 10 digit number (not the number on the outside). The number starts with a "3" and can be found by pressing the tools button, then system and then "about".

Please email me at sharcnet-usa AT sharc DOT NET


- Jim

Mar 25, 2010 | Garmin nuvi 205W GPS Receiver

1 Answer

I recently updated nt2010.20 map since then my nuvi 350 freezes while loading maps i tried reset, hard reset, preboot,when i connect it on USB i cant see device on my PC.is there any way to delete map...


NO!. THE MAPS CAN ONLY BE DELETED USING THE USB CABLE. GO TO GARMIN WEBSITE YOU MAY NEED TO DOWNLOAD THE USB DRIVERS. THEN TRY THE UPDATE AGAIN. IF THE MAPS ARE ON A CD YOU WILL ALSO NEED THE UNLOCK CODES AND THE UNIT SERIAL NUMBER.

Jan 22, 2010 | Garmin Nuvi 350 Car GPS Receiver

1 Answer

Map locked on 4070 model, how can i unlock the map


Try turning it OFF using the ON OFF switch on the bottom.. if that doesen't work try the reset button right next to the ON OFF switch on the bottom..you'll have to use a toothpick or something

Apr 22, 2009 | Sanyo EasyStreet NVM4070 GPS Receiver

2 Answers

Garmin streetpilot 2620 in demo mode


Do you have any unlock code for your unit? Delete this code "demo" from MapSource and put unlock code for your unit and try to download to unit a small part of maps.

Nov 12, 2008 | Garmin StreetPilot 2620 GPS Receiver

1 Answer

Garmin Nuvi 360 Won't Load Maps


go buy a tom tom you dont havve to do any downloads to keep it up to date.garmin has to many issues

Aug 13, 2008 | Garmin nuvi 350 GPS Receiver

1 Answer

Garmin StreetPilot 33o


Did you try to upgrade your Garmin with 2008 maps? If you have the map registration code then you will have to go to garmin's website and get an unlock code. You will need the registration code and also the unit serial number before you can get a new unlock code. The unlock code is base upon your unit serial number and will only work with that unit.

May 07, 2008 | Garmin StreetPilot C330 GPS Receiver

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