Girthyhawg

My truck is 2 Weeks old, this past weekend I took a 10hr road trip, everything was fine until I got off of interstate. 3 times in a row when I stopped for redlight or sign I felt same thing with a jerk.. like rear wheels were hitting a speed bump. Came back home, truck drove normal with minor hard up shifting... when I got to dealer after another 10 hours to drop off, it happened again but not as severe. Dealer said the saw no codes, but would keep an extra day to see if they could simulate.

I'm on my second 2020 Silverado 2500. This first had a steering issue that I think was actually a faulty electronic power steering unit. It was bought Sept of 19. but it shifted like butter. My current '20 2500 drives like a dream.... except every 800mi or so, it will also lunge when shifting down to fist right before complete stop. I took it to dealer and they said there were no codes reported. It seems like both issues I have had with both trucks started at about 1500mi

Just left dealer... p20EE bulletin #pip5664a reset nox1 sensor and performed box deduct any test. asked dealer if it happens again, I hear some ppl have issue every 150mi... he said it won’t, so I’m wondering if that bulletin was the software fix?

2020 HD light just came in tonight 1900mi... will update after dealer visit.