The contact owns a 2015 Ram Promaster City. The contact stated while operating the vehicle, the message ‘Service Hill Holder’ remained illuminated, and the vehicle experienced harsh driving and would not properly shift into gear. The vehicle was taken to the local dealer who reprogrammed the PCM under NHTSA Campaign Number: 16V529000 (POWER TRAIN); but the failure persisted. The contact stated that eventually,y the vehicle failed to start. The local dealer and manufacturer were notified of the failure, but no assistance was offered. The failure mileage was 100,000.