I can adjust temperature by Uconnect, but not fan speed or where the air comes out. The 4 commands that I can use with Uconnect on my crewcab's dual climate control are:
"Adjust temperature to 70 degrees"
"Adjust driver's side temperature to 70 degrees"
"Adjust passenger side temperature to 70 degrees"
"Adjust rear temperature to 70 degrees"
Of course replacing the temperature with whatever is desired. I originally found the first 3 commands in the Uconnect manual, but the rear temperature command I figured out by trial and error.