Air temperature actuators, left and right side

Hello,

My air is blowing warm on both driver and passenger side. The dealer diagnosed the air temperature actuators as sticking on both sides, GM part numbers 22799393 and 22799392.

I cannot find any type of videos, pictures, or how-tos for replacing the actuators on either driver or passenger side for the gen 3 CTS. Where are these specific actuators located on the driver and passenger sides?

Thanks in advance for your help!