I have a new Cadillac Concours right...when I turn on the AC the Car starts to rattle what can i do to fix it?

Question

It also makes a vibrate kinda noise to does it need a tune up and someone told me a comes from speeding

Answer 1

probably something wrong with the compressor under the hood.  perhaps the bearings are going out.

Answer 2

Sounds like the A/C clutch or the internal parts of the compressor could be at fault. Or the pressures are getting too high when the compressor is engaged. Take to A/C shop and have them take a free look at it, for no charge.

Answer 3

My 92 camaro does that.  My a/c lines are touching the fan cover.  Check to see if any of the a/c lines are touching anything.