Definitive way to tell dual climate

[whododat1]

I have pics from other thread showing a dual climate button on an 05. I have an 02 xlt and I have dashboard controls, overhead controls and rear seat controls. Does this mean I have dual zone? Is there a definitive way to tell if I do besides the obvious "dual" button???
I have to change the actuator and/or blend door and was wondering if i had dual or not.

Thanks again