Main vents not blowing air

[pontiacgp]

 

[Jay520]

When in a/c, the main vents aren't working. I am going to attempt to check out vac lines in an hr or two and will post pics up during. Appreciate all the help

 

[69hurstolds]

But air should be coming out SOMEWHERE. Bottom? Defrost? It can help determine a problem area to start. If it's coming out the defrost when it should be coming out the main vents, my bet would be the upper pod.