I have a 2019 Chevy Silverado LT. Took it in for rattling noise at 48k miles. Lifters and cam shaft were bad. Got it back and it shudders at coasting/maintaining speeds of 20-25, 30-35, 40-45...Shuddered bad once in a right-hand turn, right back wheel froze for a second. I call the dealer, of course the first said well maybe it's not a shudder, just a vibration from the tires. Smh..LOL...I said, Naaa, this is somewhere in that drive train; transmission, torque converter, drive shaft or somewhere. This was before I even new these forums and problems existed. It's going to the dealer tomorrow. WISH ME LUCK!!