The contact owns a 2022 GMC Sierra 1500. The contact stated while her husband was driving 40-45 MPH, the vehicle experienced reduced engine power and failed to exceed 30 MPH. The driver was able to pull to the side of the road. The driver turned off and restarted the vehicle. The contact stated that upon shifting to reverse(R), the RPM decreased, and the vehicle failed to respond. The driver was able to drive to the dealer, where it was diagnosed that the transmission had failed, and there were metal shavings inside the transmission. The dealer determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that the VIN was not included in a related recall. The manufacturer referred the contact to the NHTSA Hotline for the VIN to be added to a recall. The failure mileage was approximately 90,000.