'99 GMC K2500 sub AC issue

[rgrowan]

When i put the selector switch for the AC on vent or bilevel, it is blowing like crazy, but no air from dash, and only from floor on bilevel....any ideas? Vacuum issue?

[AKMark]

There's no vacuum actuators anymore. There are small electric motors, and they do go bad. Cost about $45 a piece and that one is just to the right of the fuel pedal assembly, if I remember correctly.

[rgrowan]

and its working...so how do i free up the diverter, or whatever makes the air change pathways BEYOND the actuator...its blowing, just wont com out of the dash vents...