Question about Garmin StreetPilot 2720 GPS Receiver

3 Answers

Uploaded Map Update 2008 City Navigator North American NT now maps locked

When I start unit up it says maps are locked and it no long displays detail maps.  If I search for an address it say no detail maps to display.  Spoke with basic Garmin Support two times and both said the problem was way over their heads.  They transferred me to PC support and the wait time was 30 minutes or more.  Ridiculous.  Can't sit on the phone that long.  Hopefully someone can help me here.  Also, I've entered all unlock codes and I went to and repeated to be sure they were current.  Did not help.

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  • Poulabc May 08, 2008

    I have also this problem




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I had the problem with a Garmin 2730 and what I did was hook up the usb to the unit, turn it on and when offered, selected the USB storage option. When the drive came on line called GARMIN, I went into the garmin folder, deleted gmapprom.img, deleted gmapsupp.img. I launched the mapsource DVD, highlighted all the USA maps including Canada and clicked on transfer to unit. When transfered, I went back into the GARMIN folder and renamed gmapsupp.img to gmapprom.img and no more locked codes. If you have the DVD that came with the unit, make sure a file called gmapprom.unl is there. It can be opened by NOTEPAD, and should have the unlocking code for the current DVD that you used to transfer the maps with.

Posted on Jul 25, 2008


You need an unlock code (25 Char Code) to unlock the map details...

Posted on Feb 21, 2008


I held on the phone with Garmin for about 2 hours, but they fixed my unit, PATIENCE!

Posted on Nov 16, 2007

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Only shows us routes not canada

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You need a map that covers Canada and it is an extra cost. The USA is in two zones, or one map does both zones.

You need to buy the Canada maps and then put it on an SD card. The map costs $84

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