Vacuum ?

   I'm not sure if this is the correct forum to ask this question, but here goes it?
With the console control switch in the off position when I start my car I get vacuum at my vet actuator and my vent opens.  My question is. is this correct? I've tried to find a good vacuum schematics for the interior but have not found a good one yet.  Is there someone out there who can help me with this.

Do you have A/C or no?
If your car is equipped with "Astro Ventilation", I believe the vents are opened all the time, except in "Max A/C"...not really 100% sure, but I think think that's correct.
The Factory service manuals cover all of the vacuum systems for the HVAC. If you don't have one, you can usually find them on e-bay for around $40 or so.

Since you have vacuum actuated vent, you must have A/C.  Here is a link to a vacuum diagram.

http://1-4u-computer-graphics.com/yabb/YaBB.pl?num=1200873633/0

I hope it helps

Larry

[QUOTE=VetteSpecialties]Since you have vacuum actuated vent, you must have A/C.  Here is a link to a vacuum diagram.

http://1-4u-computer-graphics.com/yabb/YaBB.pl?num=1200873633/0

I hope it helps

Larry
[/QUOTE] Thanks Larry, but somehow that's not working. This is what you were trying for: http://1-4u-computer-graphics.com/yabb/YaBB.pl?num=1200873633/0 By the way Larry this is pretty good. Thanks again. 

Larry thanks.  I do have AC and " Astro Ventilation" I didn't know the was to be open all the time except with "Max-Air".  Just seems to me a big source for added cabin heat. Vacuum diagrams on web sight are very good and will be a big help. thanks
John