white2001formula

iTrader: (5)

Well, I've been trying to figure out what a noise was on the car. It is related to the AC, becuase when I turn it on and off, the noise goes away. It is above 40 mpg, it makes a sound like you are drilling a hole into metal with a drill. Seems like the consistency and volume of the noise is related to the vehicle speed rather than the speed of the engine.

The AC is still cold, so I don't know what it would be. I have the GM extended warranty, and am going to call the factory tomorrow. I just wanted to see what you all might think just in case the factory won't cover it.

Thanks,
Chris

siggyfreud

iTrader: (1)

Wouldn't make sense for it to be the AC AND vehicle speed related. Does it do it in nuetral?

white2001formula

iTrader: (5)

No, the sound won't happen till 40+. I may/may not be related to speed. All I know is when I hit the off button for AC, the sound goes away. Just wondering what AC component that might be.

Stepside

The AC compressor.

siggyfreud

iTrader: (1)

Yeah the compressor is really the only thing that could/would make noise. Unless it's loose in its mounting, I just don't see how it would be speed related vs. rpm related. But I've been wrong before .

white2001formula

iTrader: (5)

I'm stumped to. If it's driven by the serpentine belt, the sound would change when I shift. Maybe it's just hard to distinguish volume and speed with road and wind noise.