NHTSA Complaint #11621725 — 2018 CHEVROLET SILVERADO 3500

The contact owns 2018 Chevrolet Silverado 3500. The contact stated while driving 70 MPH, the engine started misfiring and made an abnormal knocking sound. Additionally, the vehicle was shuddering. The check engine warning light was illuminated, and the message "Engine Power Reduced" was displayed. The contact was able to pull over to the side of the road, where the contact scanned the vehicle with a vehicle scanner. The contact retrieved diagnostic trouble code indicating an open circuit on the seventh fuel injector. The contact purchased the part from an unknown dealer and replaced the fuel injector connector harness; however, the failure recurred several times while driving. The contact replaced the connector harness of the second and fourth fuel injectors; however, the failure persisted. The contact was in the process of replacing the connector harness of the eighth fuel injector. The vehicle was not repaired. An unknown dealer was notified of the failure. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 65,000.