Won't blow through vents when A/C is on.

CHEVROLET SILVERADO
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BIGTA400
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I have a 1995 Chevy Silverado K1500 4WD, 274000 km, 5.7 litre engine and 4L60E trans. My blower blows air through all the correct settings until the a/c and/or recirc is turned on. When this happens it will not blow through the vents. Does anyone have any ideas as to what is ahppening and how to correct this.
Thanks
Jun 11, 2007 at 12:35 AM
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SC1 RACING
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i have the exact same truck and the exact same problem. i will let you know tomorow when i get a chance to fix it. but today i covered defrost vents with a towel...LOL
Jun 27, 2007 at 10:30 PM
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GBGTEXAS
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[quote:703c251c47="bigta400"]I have a 1995 Chevy Silverado K1500 4WD, 274000 km, 5.7 litre engine and 4L60E trans. My blower blows air through all the correct settings until the a/c and/or recirc is turned on. When this happens it will not blow through the vents. Does anyone have any ideas as to what is ahppening and how to correct this.
Thanks[/quote:703c251c47]
Sounds like you could have a broken vacuum line. Under the hood, trace any vacuum lines coming from the firewall area.
Jul 4, 2007 at 6:31 AM
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