Ed, iirc, with dual climate control, there are 3 hvac actuators in the pass. glovebox area: rh temp, mode (vent) and recirc. Only actuator between the steering wheel and radio is the lh temp. All are the same part# except the mode (vent) actuator. Looking into the glovebox opening, rh temp is on the left, mode (vent) is atop the rh temp and the recirc is top right behind a large wiring harness. Lh temp is up under the dash between the steering wheel and radio accessed by removing black plastic kick shield. I've had to replace both temp actuators. 5.5mm (7/32").
Sheila, you had to replace yours on a 9th gen? (2014-present body style)