ac is making a rattling noise

2005 CADILLAC CTS
135,000 MILES
Avatar
CCELIS08
  • MEMBER
  • 1 POST
05 Cadillac cts is making a rubbing noise while i'm driving fast and the ac is making a rattling noise while is on and off, but not often. What is it?

While I'm driving it makes a rubbing noise and the faster I go the rythm of the rubbing speeds up. It didn't sound like that when I got the car. When I put the new tires it started making that noise. Also, when my ac is on or off it makes a rattling noise, but is not persistant it goes away and it comes back.
Mar 21, 2012 at 4:33 PM
Advertisement
Avatar
DJCL
  • CERTIFIED EXPERT
  • 767 POSTS
does it only make the noise when the car is moving ? It sounds like the compressor is having a hard time. Check it out and get back to me :-)
Mar 22, 2012 at 1:27 AM