NHTSA Complaint #11710700 — 2024 CHEVROLET SILVERADO 2500

My 2024 Chevrolet 2500HD Duramax experienced a forced emissions derate event with a speed-limited countdown. The vehicle suddenly lost normal operating capability and became unsafe and undrivable. The truck was disabled in Enid, Oklahoma and had to be recovered and transported to a dealership. Prior to failure, the vehicle showed abnormal DEF/emissions behavior. The failure involves the SCR/DEF emissions system. I later confirmed this vehicle has a completed Product Emissions Recall for SCR Fault Detection. Despite that recall, the emissions system failed and triggered a derate and loss-of-mobility event. The truck is currently at Classic Chevrolet in Owasso, OK for diagnosis.