The vents in my gs300 aren't all opening. If I put the ac/heat on to any level, it doesn't blow alot. I have to have it on setting 2 to have it blow like it's on setting 1 and so on. Sometimes there's a buzzing sound that comes on here and there. It's affecting all the vents and the rear vents for the backseats don't even blow at all.

Anyone know what I need to buy? Is this something in which I can change out myself?

Please help.

 

The absolute most common issue with the GS with 12,574 threads that will pop up in a search.

Its your servos.