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ok got all brand new rubber vacuum lines, getting vacuum from engine just fine now, got a new hvac control check valve, all vacuum lines are hooked up properly, yet I still cannot get any of my baffles to operate, any suggestions?
 

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2002 astro.

my mechanic says I need to find this part my permanent defrost issue.

1: I am stumped to find this part on the interenet

2: I thought it was just going to be a vacuum line.

(defrost always on, I checked the lines and swapped out the temperature actuator)

any info of what this is, if it may be the issue and where I might find a replacement.

I'll keep searching other forums, in the meantime


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05 Astro AWD
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The vacuum actuator from under the passenger side knee bolster?
 

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I replaced this a few months ago, nothing changed.

I still think its the vacuum lines, but I still only have defrost.
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My buddy said the picture of the part he has in his hand, came from under the passenger dash cover
 

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My buddy said the picture of the part he has in his hand, came from under the passenger dash cover
Yeah, that’s what I said. It’s a vacuum actuator from under the passenger knee bolster.

EDIT: GM calls it the mode actuator
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I am working on the same problem. In my taking this actuator off the little spring that goes on the lever came off and I can not figure out what way it goes.
 

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I hope you've figured it out by now.

this part is impossible to find, ordered a jeep part that looks similar.

months later (I am overly busy) and still have this thing torn apart.

I think defrost only, might be in my future.
 
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