The contact owns a 2019 Chevrolet Silverado 1500. The contact stated that while driving at various speeds, the vehicle shuddered upon depression of the accelerator pedal. There was no warning light being illuminated. The vehicle was taken to a dealer where the torque converter was replaced. Recently, upon exiting a rest stop at 45 MPH, the vehicle stalled with several messages on the instrument panel. The contact pulled the vehicle off to the highway shoulder and the vehicle was towed to a local dealer. Once at the dealer, a diagnostic test was performed and the contact was informed that the lifters, the camshaft, and the pushrod were all defective and needed to be replaced. The manufacturer was notified of the failure and the contact was promised a call back, which was never received. The vehicle was repaired. The failure mileage was approximately 30,000.