The middle air vent wont work now - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-21-2003, 06:00 PM   #11
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I think those guys destroyed your car. Time to trace their footsteps. Find their wiring harnesses and see where they go through the firewall, and also if it goes in the vicinity of the climate control vacuum manifold near the bottom left corner of the glovebox.
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Old 03-26-2003, 06:02 PM   #12
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I looked all over , I did fine the six nipples under the dash on the right side . I traced 4 of them coming from under the dash on the drivers side every thing looked in place. But the nipples on the right side had six in all. There is a fifth one that looks like its from the right side, but theres one more free nipple with no hose around. I looked for the sixth hose all over the right side and no luck. can any one tell me the color hoses that should be there.

Thanks for all your help
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Old 03-26-2003, 06:59 PM   #13
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Quote:
Originally Posted by Alvin Muniz
There is a fifth one that looks like its from the right side, but theres one more free nipple with no hose around. I looked for the sixth hose all over the right side and no luck. can any one tell me the color hoses that should be there.

Thanks for all your help
Will need a manual to know for sure, but keep in mind that there has to be an open port in the system somewhere, or else vacuum-activated devices can't be turned off, because you need to allow air _in_ whenever you want to release a vacuum-operated device.
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Old 03-26-2003, 11:16 PM   #14
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I need the 95 service manual.

I have the 94 service manual, there is supposed to be a violet, blue, white, light green, and orange. The violet one is your vacuum source from the vacuum tank.
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Old 04-08-2003, 06:24 PM   #15
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It was what Fuddyduddy 121 told me to do the first time. Its like what they say when your not looking for it your find it , thats what happen sat, any way this is what he told me to do ((Start by looking around under the hood for a hissing sound on the firewall. If the vacuum supply becomes disconnected then the HVAC programmer can't change the output vents. There are tubes that come from the throttle body and go to a vacuum tank on the firewall, before they go into the HVAC programmer. )) thats what it was thanks alot , I hope some day ill be able to help you , the other people who also help in this forum, and any one else in the bonne club thanks talk to ya late peace out . :P
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