1995 Cadillac Seville STS Northstar V-8 (101,000 miles) only blows cold air (when a/c on) through front window defrost/defog vents. Problem began about two weeks ago and would sometimes blow though a/c vents, other times though defrost vents. Now only though defrost and no air coming from the dashboard a/c vents. All I can findindicatespossiblebad vacuum line or air flow controller door failure. Where arethe vacuum lines and air flow controls? Can you postrepair procedures/photos/diagrams or refer to another thread where this topic was covered? Thank you.

 

If you take the glove box out there is an electric motor on the air distribution box. chances are this is the problem pretty easy to replace yourself and some aftermarket companies make them.....