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I have a 87 Seville. Standing in front of the hood to the left near the rear is the heater control valve that has hoses running to it and a vacuum line............Just to the right of that is a frame screwed down with and electrical part on top with a vacuum line (or two) running to it at the bottom. There is two vacuum ports but on mine there is only one vacuum hose. If I knew what the thing was it may help me figure out where the missing vacuum hose comes from. I searched my service manual and no help and the forum with no help. the Cadillac garage would probably want cash to tell me.
Thanks for your time.
 

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White Diamond '03 DHS (with DTS floor shift)
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yeah, a picture would be worth a thousand words.
 
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