NHTSA Complaint #11702474 — 2021 CHEVROLET SILVERADO 1500

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while stopped at a stop light, the vehicle began to shake violently. There was no warning light illuminated. The contact then stated that there was an abnormal knocking sound coming from the engine while depressing the accelerator pedal. The contact pulled over and restarted the vehicle; however, the knocking sound persisted. The contact slowly drove the vehicle to the residence and later had the vehicle towed to the dealer. Upon investigation, the contact discovered NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The vehicle was not diagnosed or repaired and remained with the dealer. The manufacturer was not notified of the failure. The failure mileage was approximately 34,000.