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Fairly new to posting here, so please let me know if this question would do better in another spot. I have a 2017 Sierra 1500 SLT. About 2 years ago when it was hot out,I started my truck, and the dash started flashing through all of the warning signs(seat belt, air pressure, pretty much every warning). None of my gauges worked on the dash, but my infotainment system worked, and my lights, including blinkers, on the outside worked. After running it for about ten minutes, it like reset itself and the dash started working. It was under warranty at the time, but only happened once. Now, my truck is no longer under warranty, and it happens every single time it's hot outside. The dealership said they'd have to keep my truck for awhile to let it mimic the issue, and I know they will charge me out the ass just to find the problem, before asking for a couple grand to fix it. Considering it only happens when it's hot, I feel like something is expanding and making a connection issue. Has anyone had any experience or heard of this? I would greatly appreciate any advice on what to look for it how to test the issue. I did use a tester while it was doing it last time, but no codes came up. I'm really confused.
