95 olds acheiva,45k miles,a/t a/c slight weird noise coming from alternator area. it sounds worst when a/c is on. maybe imagination ,but looks like belt dust around that area. might be one of the pulleys are dragging or a/c compressor clutch going out??? some of these 3.1 litre v/6,s have a rep for going thru alternators quickly. i just bought this car so i ain,t sure. anyone experienced this??