Gm navigation disc centr7/16/2023 ![]() ![]() The nav disc is removed and a software update dvd is installed temporarily that reprograms the nav radio. ![]() ![]() It would be necessary to visit a dealer to correct this. There have been issues with black screens on your vehicle with nav radios and there is a software update that should correct it. One is the screen/radio failing but more commonly it is an issue with the software. Unfortunately there isn't much you can do on the road to correct this condition. ![]()
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