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1964 buick riviera heater vacuum conection questuon?


demon452
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New here so wanted to say hello first to all. 

My question is on the bottom side of the heater/ac controls there is a plastic piece with 2 connections for hoses. Pic is enclosed. Where do they connect to? I have a manual and there is no info. I found the info for every other vacuum lines besides these 2. Any help is greatly appreciated.

 

20180414_054023.jpg

 

 
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Ok so I noticed in my manual that the large 1 has a tee into the 4 post vacuum.block and it shows the smaller port going to the firewall. It was under the 4700 series vacuum diagram. I cannot find anymore info anywhere. Please help.

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  • 7 months later...

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