When you push different buttons on the automatic climate control, does the air change which vent it'* coming out of? Like can you change from defrost and then to heat and the air correctly moves then? That would indicate you're getting vacuum to the controller unit inside the car.
I repaired the programmer vacuum connector in my 98 (LeSabre) because the 6-7 plug connector for the vacuum lines has little nipples in the connector that soften with age and suck into the opening when vacuum applies and shuts off the vacuum on a line. It is possible to remove the programmer, open the box, list connector colors in and out, cut out the connector, reconnect the 1/8" vacuum lines with gas line about 1.5 inch long and have everything working again. IF that'* what you problem turns out to be.
Assume the easier first. Everytime I did something on the spark plugs or wires on my 93I bumped the vacuum line to reservoir tank on the firewall built into the Relay Center plastic. First make sure vacuum is getting into the programmer inside the car.
Dual auto air on both