NHTSA Complaint #11614019 — 2017 GMC ACADIA

The contact owns a 2017 GMC Acadia. The contact stated while driving at an undisclosed speed, the transmission unexpectedly downshifted, with the shift to park message was displayed. The contact attempted to restart the vehicle, but the vehicle failed to shut off when the contact attempted to engage the parking brake. The contact forcefully engaged the parking brake to shut off the vehicle. The vehicle was taken to the dealer where it was determined that the transmission failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately 13,000.