This forum is a great source of information and help, however your post is vague. Please provide a more detailed explanation of your problem, history and what if anything you've tried so far to fix.
I have a 1997 Buick LeSabre limited that has the automatic climate control feature. When we bought the car last year we noticed it took about a half hour for the air to start coming out the middle vents, it would only happen once in a while though. Right now it only blows air out the defrost and...
Thank you for the diagram, 2007LucerneCXL. I'm new here and wandering around. One problem with my 1999 Lesabre LTD is no heat/ac in the panel (middle) position. I thought maybe the heater hose to the panels was cut, but now I see both the valves are vacuum controlled. May need to investigate further. Plenty of air out the floor/windshield.