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Reply With QuoteThe official Garmin download package for nuvi 255W CHN HWID 0931 V3.40 contains a GCD rather than an RGN file:
However here's the RGN made from that GCD:Code:Please Login or Register to see the links
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Thread: about nuvi 255w CHS 340 firmware
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7th April 2026, 02:02 PM #1Junior Member
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about nuvi 255w CHS 340 firmware
Currently, the firmware for the nuvi 255w available on the forum is the international version. However, I am looking for a complete firmware for the Chinese Mainland version (the latest being version 3.40 updated in 2010), which includes an RGN package (similar to S40827_NA610_CN330_sonic.rgn) for flashing. I wonder if anyone still has this software and could share it with me. Thank you.
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8th April 2026, 01:15 AM #2Garmin/GPS Systems GMod.
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