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Updates & Downloads

GPS Chipset Type M4 (2778) software version 4.20

as of April 18, 2017

Use Garmin Express to install this file.

(559 KB)

View system requirements


Change History

Changes made from version 4.10 to 4.20:

System requirements

  1. IBM-compatible PC running Windows 2000 or later operating system and an available Com 1, 2, 3, or 4 port.
  2. PC Interface Cable for your GPS unit. The PC Interface Cable may be purchased through your local Garmin distributor or ordered direct from our Online Store.