The contact owns a 2021 GMC Yukon. The contact stated that while driving at an undisclosed speed, the transmission warning light illuminated. The vehicle was taken to a local dealer where it was diagnosed and determined that the transmission needed to be replaced. The vehicle was not repaired and remained at the local dealer for further investigation. Upon further investigation, the contact related the failure to NHTSA Campaign Number: 24V839000 (Power Train); however, the VIN was not included. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 63,000.