Tell me about it, I tried the hard wire method on an 8 hour trip this weekend and guess what? I got my CarPlay to work. Of course it took some setting changes where I had to delete my truck from my phone and delete my phone from my truck then link them back together. So yeah, it worked. Until I was 2 1/2 hours into my trip then the entire infotainment screen went dark. Luckily the truck was still operational and didn’t shut down on me and of course, since I was driving, once it rebooted itself (3-4 minutes) I couldn’t connect anything because the truck was not in park. I drive another hour to the next stop and had to reset the connections again
GMC has really got to fix this; and me taking off from work to get a 2024 truck fixed pisses me off.