I was run over by a truck after a road rage incident and they have not found the driver. If he''s found will I lose my uninsured motorist settlement?

If you already have the settlement you will not lose it. In that situation the your insurance carrier will sue him for the amount they paid you. Whether or not they are successful in collecting from him is not your problem. Fortunately that is precisely the purpose of uninsured motorist coverage. Good Luck