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GARMIN GPSMAP276C Firmware Upgrades

Firmware: V5.70 - V5.60 - V5.50 - V5.40 - V5.30 - V5.20 - V5.10 - V5.00 - V4.90 - V4.80 - V4.70 - V4.60 - V4.50 - V4.40 - V4.20 - V4.10 - V4.00 - V3.70 - V3.50 - V3.40 - V3.30 - V3.20 - V3.10

The following lists of changes are based on information provided by GARMIN. Changes or improvements which we consider important or especially useful are shown highlighted.

To view the current firmware version, complete the following steps:

  1. Go to the main menu.
  2. Use the rocker key to highlight "Setup".
  3. Press the Menu key to access the submenu.
  4. Select "Software Version" and press the ENTER key.
  5. The current firmware version will be displayed on the screen.
  6. Press the ENTER key to quit the screen.

Each upgrade replaces the complete firmware in the GPS, which means you need to install only the version you wish to apply. There is no need to install any previous versions.


Changes made from version 5.60 to 5.70: (released 05/13/2013)

  1. Support for new 010-10517-02 battery pack.

Firmware Upgrade V5.70 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.4 MB)

To table of contents


Changes made from version 5.50 to 5.60:

  1. Improved GPS satellite acquisition processing.
  2. Updated magnetic variation table with IGRF 2010 model.

Firmware Upgrade V5.60 (Not available for download)

To table of contents


Changes made from version 5.40 to 5.50:

  1. Added support for large NAND datacards.
  2. Improved power-up processing.

Firmware Upgrade V5.50 (Not available for download)

To table of contents


Changes made from version 5.30 to 5.40: (released 03/18/2009)

  1. Improved battery gauge accuracy.

Firmware Upgrade V5.40 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.7 MB)

To table of contents


Changes made from version 5.20 to 5.30:

  1. Improved compatibility with 512 MB data card.
  2. Improved unit behavior when a blank data card is inserted.
  3. Improved display of battery charge level.

Firmware Upgrade V5.30 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.7 MB)

To table of contents


Changes made from version 5.10 to 5.20: (released 01/02/2008)

  1. Corrected address search operation with MPC maps (MapSource Custom Maps).

Firmware Upgrade V5.20 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.7 MB)

To table of contents


Changes made from version 5.00 to 5.10:

  1. Improved GPS satellite acquisition under certain conditions.
  2. Added support for City Navigator update DVD.

Firmware Upgrade V5.10 (Not available for download)

To table of contents


Changes made from version 4.90 to 5.00: (released 06/29/2007)

  1. Corrected external voltage alarm persistent behavior between power cycles.
  2. Corrected state and country information for city searches.

Firmware Upgrade V5.00 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.7 MB)

To table of contents


Changes made from version 4.80 to 4.90: (released 03/27/2007)

  1. Improved NMEA output.
  2. Daylight saving changes for United States.
  3. Added Mexican time zones.

Firmware Upgrade V4.90 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.7 MB)

To table of contents


Changes made from version 4.70 to 4.80: (released 01/26/2007)

  1. Corrected 'persist' setting for external voltage alarm.
  2. Improved ability to move user waypoints while editing a route.

Firmware Upgrade V4.80 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.7 MB)

To table of contents


Changes made from version 4.60 to 4.70:

  1. Improved display of recommended route lines on marine charts.
  2. Improved operation when moving user waypoints with the map cursor.
  3. Corrected issue with changing usage mode from the Setup tab of the main menu.

Firmware Upgrade V4.70 (Not available for download)

To table of contents


Changes made from version 4.50 to 4.60:

  1. Corrected issue that could cause 'WorldMap' series maps from being displayed.
  2. Increased the number of characters allowed to display map zoom status.
  3. Corrected text translations.
  4. Clear trip data to correct issue with previously stored data.
  5. Added Czech voice support.

Firmware Upgrade V4.60 (Not available for download)

To table of contents


Changes made from version 4.40 to 4.50:

  1. Corrected issue in previous software revision that could cause some unit settings to be restored to defaults.
  2. Corrected issue in previous software revision that could prevent the time zone from being changed.
  3. Corrected issue that could cause the odometer field value to become inaccurate.
  4. Corrected occasional unit shutdown during powerup.
  5. Improved address search when using postal codes.
  6. Updated text translations.

Firmware Upgrade V4.50 (Not available for download)

To table of contents


Changes made from version 4.20 to 4.40: (released 09/07/2006)

  1. Changed distance displayed when measuring distance on the map page to use two digits of precision in marine mode.
  2. Improved performance of Marine Services search.

Firmware Upgrade V4.40 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.7 MB)

To table of contents


Changes made from version 4.10 to 4.20: (released 05/12/2006)

  1. Fixed SBAS compatibility issues with the Japanese MSAS system.

Firmware Upgrade V4.20 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.7 MB)

To table of contents


Changes made from version 4.00 to 4.10:

  1. Improved display of lake depth contours.
  2. Improved TracBack when using the entire track.
  3. Improved GPS reception.

Firmware Upgrade V4.10 (Not available for download)

To table of contents


Changes made from version 3.70 to 4.00:

  1. Added Iceland time zone.
  2. Added support for latest Garmin map technology.
  3. Added ability to select units used for displaying vertical speed.
  4. Added ability to quickly select entire track for use with TracBack.
  5. Improved voice guidance for road routes.
  6. Improved Compass page in Automotive mode.
  7. Improved Sonar page.
  8. Improved Find menu.
  9. Improved map selection when changing usage modes.
  10. Corrected issue that could prevent some message log filter settings from being saved.
  11. Corrected issue that could cause unit to shut down when using the Highway page.
  12. Corrected issue with waypoint timestamp updates when transferring from Mapsource.
  13. Corrected display of 'L' symbol in Turn data field.
  14. Corrected display of 'Route Truncated' and similar messages when using USB.
  15. Corrected display of cardinal direction on map page when measuring distance.
  16. Corrected duplicate waypoint creation with GPWPL NMEA sentence input.
  17. Corrected highlight movement problem on proximity waypoint page.
  18. Corrected invalid display of Next Turn data field.

Firmware Upgrade V4.00 (Not available for download)

To table of contents


Changes made from version 3.50 to 3.70: (released 10/21/2005)

  1. Corrected issues with address search.
  2. Corrected issue with incorrect battery timer display.
  3. Added output of NMEA APB sentence.
  4. Corrected issue with restoring defaults on Com setup pages.
  5. Corrected issue that could cause 'lock to road' setting in Automotive mode to be reset.
  6. Corrected issue that could cause unit to power off when editing information on the Welcome setup page.

Firmware Upgrade V3.70 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.5 MB)

To table of contents


Changes made from version 3.40 to 3.50: (released 08/30/2005)

  1. Improved visibility of airport runways on detailed maps.

Firmware Upgrade V3.50 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.5 MB)

To table of contents


Changes made from version 3.30 to 3.40:

  1. Removed possibility of accidentally enabling 'Lock To Roads' when not in Automotive mode.
  2. Added configurable field for UTC Time.
  3. Improved Low Battery warning message.
  4. Fixed nav alarms (next turn, arrival, off course, and anchor drag).

Firmware Upgrade V3.40 (Not available for download)

To table of contents


Changes made from version 3.20 to 3.30: (released 06/10/2005)

  1. Added support for German tide stations.
  2. Added support for more time zones.
  3. Added support for NMEA BWC and extended DSC (DSE) sentences.
  4. Added support for LakeMaster maps.
  5. Added ability to select a particular map family when performing an address search.
  6. Added ability to stop navigation from the Current Route page when in Automotive mode.
  7. Improved accuracy of track log generation.
  8. Improved readability of owner information text during powerup.
  9. Improved USB transfers from MapSource.
  10. Increased resolution of distance fields when in Marine mode.
  11. Corrected shutdown that could occur when performing a TracBack in Automotive mode.
  12. Corrected shutdown that could occur on the Line tab of the Map Setup page.
  13. Corrected default Nearest Type selection on Position page.
  14. Corrected display of map outlines.
  15. Corrected functioning of Off-Course alarm.
  16. Corrected date display on Celestial pages.
  17. Improved display of street addresses in Find menu.

Firmware Upgrade V3.30 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.5 MB)

To table of contents


Changes made from version 3.10 to 3.20: (released 03/15/2005)

  1. Fixed GPS unit-to-unit transfer of user data.
  2. Fixed handling of display-options menu on the volume/backlight page.
  3. Fixed waypoint category highlight error when dealing with a large category list.
  4. Fixed problem where 'Searching' text would be displayed without results when performing a 'find'.
  5. Added 'Show on Map' option to menu of the Tide Review page.
  6. Added Sonar tab page to the Main Menu in Marine mode.
  7. Improved readability of scroll bar arrows in Night mode.
  8. Darkened Automotive mode Metro Area colors in Night mode.
  9. Restored Find menu functionality when projecting a waypoint position.
  10. When projecting a waypoint, the navigation context is now consistent.
  11. Restored ability to download almanac data.
  12. Added translations for the Greek language and updated other languages' translations.

Firmware Upgrade V3.20 (Self-extracting ZIP-file, requires a PC and a connection cable, 2.3 MB)

To table of contents


Changes made from version 3.00 to 3.10:

  1. Fixed problem that could cause the unit to turn off when the map heading line is enabled.
  2. Fixed problem that would prevent changing the CDI scale using the zoom in/out keys in Marine mode.
  3. Improved readability of map label text in Automotive mode.
  4. Fixed the Sun & Moon page to update the date and time when using the 'Play' and 'Fast Forward' buttons.
  5. Corrected 'find' operation behavior when a diacritic character is highligted.
  6. Changed to use 24x24 custom waypoint symbol in connection with xImage.
  7. Fixed functionality of projecting a waypoint by using the find menu.

Firmware Upgrade V3.10 (Not available for download)

To table of contents


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