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Air blows,a/c & heat, why doesn't the mode work, only blows feet and defroster

(2004 Chevrolet Tahoe)
in Purcellville, VA on June 12, 2012
Always blows defroster and feet no matter what the setting
Displaying 2 answers & 1 comments
Popular Answer
of Greg's Orange Auto on June 12, 2012
POSS BLEND DOOR STUCK OR BROKEN SEEK DIAG AND EST
of Miles Auto Services on June 12, 2012
Mode door or motor that changes the door position may have failed. This problem can be diagnosed with a Tech 2 GM scanner. A few other scanners may be able to do it also but the higher end scanners are needed.
on June 12, 2012
Not just a OBD2 code reader.
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