You may be right about the vacuum hoses, but it will help to know what year Caprice you have (also knowing the engine would be nice too).
I have an '85 Caprice V8 305ci (Federal, not Canada) and my climate controls work (I always hear a bit of a hissing sound when disengaging (OFF) the controls or sometimes when switching the controls to another settings).
Also it would help to know when this occurred or if something else happened and this happened at the same time? Were you working on something and the climate controls stopped working?
Details help us out!
