Updates & Downloads

Montana 650t, Taiwan (GCD file) software version 2.80

as of October 22, 2018

Use Garmin Express to install this file.

(21.48 MB)

View system requirements

Notes:

• WARNING: If this software is uploaded to a device other than that for which it is designed, you will not be able to operate that device.
• If attempts to upload software fail, you may need to return the device to Garmin® for service.

Change History

Changes made from version 2.60 to 2.80:

• Support ALT battery settings

System requirements

1. IBM-compatible PC running Windows 2000 or later operating system and an available USB port.