Updates & Downloads

Montana 650t, China (GCD file) software version 2.70

as of October 22, 2018

Use Garmin Express to install this file.

(21.61 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 2.70:

• Support ALT battery settings

System requirements

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