A/C is not coming out of the vents no matter what button I push?

Yes sir you have a problem with your vacuum lines, on bottom of the dash on the passengerside you will have to remove a panel on the bottom to access them you can either test is or clip the pink line and plug into the blue port on the ac (will always blow toward you) otherwise check your harness to makesure all connections are tight and that your switching block is working if you need morehelp feel free to contact me at admin at whypayforhelp.D. Org

I have a 1994 buick lesabre and my air works fine but does not blow from the main vents like yours it only blows form the feet area and where the vents are right in front of the windshield if you replace the HVAC module it fixed the problem for me.