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Discussion Starter #1 (Edited)
2001 Impala, 3.4 Liter V6, Stock.
This started the other day. The air Volume coming out of the A/C vents has dropped very low, like the fan on 1 and it is really on 5. The fan is working like it should. Sometimes the adjusting the sector control knob will let it switch between the defroster to vent to floor, and other times it will not. There is No cabin air filter in my car. Could it be a bad vacuum line, switching diaphragm, climate control head?
 
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