NHTSA Complaint #11557669 — 2015 CHEVROLET SILVERADO 1500

The contact owns a 2015 Chevrolet Silverado 1500. The contact stated that while her husband was driving 75 MPH and overtaking another vehicle, the engine made an abnormal clunking sound, and the check engine warning light illuminated. Additionally, the engine started making abnormal knocking sounds. The contact's husband pulled into an AutoZone parking lot, where it was diagnosed and determined that cylinder #6 was misfiring and that the knock sensor had failed. The contact stated that her husband replaced the parts; however, the failure persisted. The vehicle was towed to the residence. The vehicle was then towed to the dealer, where it was diagnosed and determined that cylinder #6 was misfiring. The dealer determined that the lifters needed to be replaced. Additionally, the dealer informed the contact that further inspection was required to determine whether the camshaft needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 70,186.