Question about Chevrolet Cavalier

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I have 91 chevy cavalier with a vacume hose that runs along the fire wall it t hooks into a hose behind the air filter and travles along the driver side wall down to a black ball where dose it travle to the passenger side cant find other part or the hose

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It may go to the Modulator-Valve on the trasmission... Hope this helps you??

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Depands on year and model. Early models have a cable with directs the vent openings. If early check cable has not come off behind the sliding knob or more common the cable is broken. If later model usually controled by vacum. Check behind dash for hoses connected. First check under bonnet on passenger side near firewall. Look to see if small vacum hose has not come off or is cracked. It is about 3/4mm (1/4inch) thick. It runs into the cabin through the fire wall. Inside the car it is behind the turn knob in the dash. Again check hose and connections. I have even found them fallen off under the passenger side dash, people kick the hoses without realising.
I hope this helps

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'06 Silverado 4.8L Air Vents selector does not open and close any vents anymore. Stuck in the Defrost/Feet position.

Look for vacum hose under hook going into fire wall, check for vacum if none add vacum or look for vacum hose hanging some where and reconnect.

Dec 17, 2009 | 2006 Chevrolet Silverado 1500 2WD

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1991 cavalier vl model diverter dor for vent,heat,defrost. not working is this controled by cable or is it a vac controlled system thank,s

No look for vacum hose under hood that runs into fire wall, make sure it has vacum, if no vacum add vaum to it.

Dec 10, 2009 | 1991 Chevrolet Cavalier

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My 2000 tundra will only blow hot air on my feet, but not all the middle vents. Any ideas whats is wrong here?

Check for a vacum leak under hood on passenger side by fire wall, look for vacum hose going into fire wall, make sure it has vacum.

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Need coolant hose diagram for 1992 Chevy Cavalier

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I need to know where the hoses go from the heater core?

Have had the same problem with a Corsica.The reason they bypassed the heater core is that it had a hole in it.Reccomend filling with water prior to hooking up hoses.

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none of the above, the vent door is stuck inthe open position most probable cause is vacum leak look closer to your fire wall and you will see a very thin vacum hose going into the vehice which seems to be unpluged!!

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