did it lastnight for the first time after a start-up and i clicked the AC on. this morning i started it up and heard the same thing...turned on the AC it got worse...revved it a bit, it got louder... then quit.

is this a bad belt?

 

Sounds like a the belt is slipping abit possibly have the dealer inspect the tensioner .There is no adjustment on the AC/ALT belt only on the PS belt .Jens