Well, I recently got this car, and have been driving it daily now. I have a few problems, but one that I'm not fully sure of is the blend door. I think thats what its called, but what happens is, anywhere you put the fan settings, floor, mid, defrost, etc. it all goes out the top, and a slight bit out of the bottom....I get nothing from the vents from the dash. I looked on oreilly's website for the part, but they don't list anything for a blend door actuator. I am fairly certain there are no vacuum leaks. I looked under the dash, and thought the t-bird under dash area was tight....the buick has less room! So, with that said, has anyone had to replace/fix this issue? and did you have to pull the dash? Sorry for such a silly question, but before I get to much into it, I would like to see if anyone from here knows.