Dash Electrical Noise

[cerbomark]

Sounded like a CD trying to load. Spent about 1/2 hr with head under dash with key on accesory and every so often it buzzes. By accident I found when I moved the vent direction switch that was the sound. Moved it to a few other settings and it stopped. It was doing it with switch set on face vents and bottom. Will it continue? Does it need attention? Any TBS info on this? Thanks

09 GMC Sierra, with 4000 miles. Not the auto dual zone controls.

[gmtech4]

not your problem,its GMs ,take it in

[txab]

not your problem,its GMs ,take it in

 

+1

 

Don't waste any more of your time searching. Dealer will take care of it

[cerbomark]

Update/pulled the two fuses that control the HVAC which may cause it to reset. It has not done it again. Hope that s it but at least I now recognize what it was casuing the noise.