Like others, I can get air flow out of the defroster and lower (heater) vents, and switch between them. Nothing, however, comes out of the front (face) vents. There is apparently vacuum getting to the control box up under the dash, and I can get to three of the four vacuum servos. Can anybody tell me the best way to get at the fourth servo, and how to get the control box removed so I can look it over? Would removing the Driver's Info Center display and the heater/ac console above the radio give me access? If so, how are these removed...I don't see how to get the plastic frame piece separated from the shift cover and out of the way. I'd sure appreciate any advises. John Sutherland; Midlothian, VA.

 

try this..

https://www.corvetteforums.com/AC_ve.../m_1077/tm.htm