Blend Door Actuator location on a 2012 yukon denali

[aztec]

hello every one i have a problem with my a/c on my 2012 yukon denali.
The air flow on the driver's side (first two vents from left to right) is warm while the air on te passanger side is cold.
I am thinking it may be the Blend Door Actuator but somebody said that there is more than one actuator.

I like to know if this is right and how would i know which one is the one with the problem.

If somebody can help me with the part number and location of the actuator (s) i will really appreciate it.
thanks in advance.

 

[swathdiver]

Sometimes they just have to be reset and information can be found on youtube on how to do it. Where do you live? A person with a Tech2 can diagnose your problem accurately within moments usually. Mine acted up the other day and I used my Tech2 to reset the doors and all was well.