I just dropped my 2021 Silverado 5.3L (13,000 Miles) to the dealer this weekend, same issues. Service Parking Brake, Service ESC and Engine Light Indicators went off while driving. Shuddering, knocking at idle and while driving, basically running like dogshit. Service Department called and said there were several misfires, countless error codes and that my Lifters were bad. Of course, they are backordered from the factory, so who knows when I'll get it back. Definitely time for a recall!