2004 Chevrolet Tahoe Q&A

2004 Chevrolet Tahoe Question: air blows,a/c & heat, why doesn't the mode work, only blows feet and defroster

Always blows defroster and feet no matter what the setting -
Answer 1
POSS BLEND DOOR STUCK OR BROKEN SEEK DIAG AND EST -
Answer 2
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. -
Comment 1
Not just a OBD2 code reader. -