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I have been so happy with SuperCruise on the Hummer EV, it had been perfect for me every time I used it, today I went through a couple of tunnels with SuperCruise on, and in the second longer Tunnel, SuperCruise disconnected, and the rest of the day I could not use it, even back on freeways it worked on yesterday? @Nebula1701 any ideas? Why would it crap out and then not work again the rest of the day? Is there something in the settings I am missing? Is SuperCruise moody? When I push the button to activate it, I get a SuperCruise not available message. Try adaptive cruise control. Operator error, or did I break my new toy?