NHTSA Complaint #11629162 — 2024 CHEVROLET TRAVERSE

The contact owns a 2024 Chevrolet Traverse. The contact stated while driving at various speeds, the check engine warning light illuminated on the instrument panel. The vehicle was taken to several dealers and the contact was informed that the issue was related to the OnStar feature. The contact called OnStar but was informed that the App was not responsible for the check engine warning light being illuminated. The vehicle was taken back to the dealer and a reset was performed of the check engine warning light. The contact stated that while driving at various speeds, the transmission unexpectedly downshifted without warning. In addition, the contact stated that upon turning off the vehicle, an abnormal, banging sound was coming from the engine. The vehicle was taken back to the dealer however, the cause of the failure was not yet determined; however, the contact was informed that the front drive axle was leaking. The front drive axle was replaced; however, the failures persisted. The manufacturer was notified of the failure but offered no assistance and the contact was provided a case number. The vehicle was not repaired. The failure mileage was approximately 500.