Has anyone found a fix for vibration of the rearview mirrors? This mainly shows up when the wind is 'up' and at highway speeds. This is not limited to just the diesel models. Fellow workers have 1500 models and they have same problem. Truck has been back to dealer and had the latest and greatest 'stiffer' mirror installed as directed/recommended by DC service bulletin. With this new and improved mirror it still vibrates at highway speeds. Passenger mirror also but with that being concave it is not at noticeable. Is this a case of just live with it? Has anyone found a fix to this? Dealer and DC seem to have tried all they can think of at present time.