It's a glitch. All nav owners have it.
Basically it's leftover from the Armada, which has dual-zone climate control, and that is the display for it. It goes away by itself.
However, this has made me consider upgrading the A/C if possible to the Armada's. I don't see why it would be that hard since the computer for it is obviously in place.
Here is a pic of my truck doing it, but without the "Driver" and "Pass" but mine does that sometimes too.
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