i have a 1999 gmc yukon 2*4 and one day me and the wife were driving and the air quit comming out the vents the blower moter still worked and would change speeds with the switch so i talked to gm and they said it was the air door selector motor (the motor beside the gas pedal) so i put a new one on it and itis still doing the same thing so i called them again and now they can't tell me what it is i thought it was themotor beside the actual blower motor so i unplugged it and it worked for a hour or so and now i have give up on it

if anyone knows what is going on or have had the same problem pleasepost a reply

 

need more info...was it on a/c?..was ithot out?...did it change modes and blow out elsewhere,or just sort of peter out?