The ECM went out on mine, a couple weeks ago. Sat radio antenna leaked, fixed by dealer, leaked the next week. I siliconed it and the 3rd brake light. Vibration issues since new. New driveshaft, new axle shafts, new brake rotors, new tires, out of my pocket. Did it all at the same time, vibrations "mostly" gone. Rear seat rattles, still haven't fixed it, I just leave the seat up, and it doesn't rattle. Transmission shifts like ******. Even after a tune, it's better, but still ain't great... The factory paint suuuuuucks.
My old 2014 Silverado, had vibration issues, shifted like crap, antenna leaked. Dealer never fixed any of it. Several dealers...