I just read the service procedure for this - it's 5+ hours of time for someone familiar with doing it. You have to remove the steering column, driver's seat, and the entire dash. It's a big job, IMO.
Once you get to the part, it's a piece of cake, but wow...what a mess. The rear a/c is a MUCH simpler job - just pop off the right rear trim panel, and there's the blend door actuator.
FYI - if you have automatic a/c, there are two blend door actuators. If I ripped apart the dash to replace one, I'd probably go ahead and replace the other one while I'm in there unless the parts are prohibitively expensive. I'm guessing this is a $500+ job unless you DIY.