When l turn knob to have air come threw dash vent it only come out of windshild no matter where the knob is set.Can anyone tell me how to fix?Could it be a vacum line leak and if so wheres it located

10

Asked by Aug 07, 2015 at 03:08 PM about the 2002 Chevrolet TrailBlazer LS

Question type: Maintenance & Repair

1 Answer

75,615

The system has lost vacuum. When this happens it defaults to defrost. Look for a disconnected vacuum line coming from the engine going to the firewall. That'll be it. HTH. -Jim

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