Good Afternoon, My brother was driving my Nissan Titan XD 5.0 Cummins Diesel from Naples, FL to Ft . Lauderdale FL , and the truck was running fine at around 70-80 mph with no issues .As soon as he proceeded to the exit in Lauderdale around 60mph, all of a sudden truck flashed all kinds of warning lights came on randomly and motor shut down . Smoke coming from starter and solenoid below the fuse box. He is an engineer for North Collier Fire and put out the flames immediately . I took the motor in to shop and they found the motor was seized up and burned harness near starter. I went to a few mechanic shops including Nissan and no one could give me a solid answer on what had happed with the truck , besides that it just seized up . No one would take blame. I was trying to do some research on these trucks and found numerous owners had the same problems as me. I hope no one gets hurts further from the malfunction of these vehicles . My brother was very lucky to get off off the road. Please look into these safety matters and find out who/or what companies should be held responsible. Thank you for your consideration with this matter, [XXX]