Cadillac CTS The mid-sized sedan that has grown the popularity of the Cadillac brand with it's low price and sleek styling

2003 cts rumbling/grinding sound when accelerating

Old 07-10-2011, 10:51 PM
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Join Date: May 2011
Posts: 38
Default 2003 cts rumbling/grinding sound when accelerating

I've got a problem and I can't seem to pinpoint where exactly the noise is coming from. It's a 03 cts 3.2 automatic . When I'm driving and accelerating from a stop I hear a sort of rumbling sound. I first thought it was my waterpump (which was going out) but after I changed it . I still hear that rumbling noise. Then I found out one of my mounts was messed up pretty bad. I got it replaced today. And now I hear it even more. Has anyone dealt with anything like this? It only does it when accelerating
Old 09-04-2012, 10:17 AM
Junior Member
Join Date: Sep 2010
Posts: 5
Default Grinding sound from rear of 03 CTS

I had this noise from the rear end like the tire is uneven.
I have changed tires and put new tires.
I changed the rear shocks.
I then changed the Deferential oil. Royal Purple
Then I changed the tires again to Michelin.
No luck
Then I put in two new hubs.
All noise is gone car sails like on air.
Old 10-12-2016, 09:52 AM
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Join Date: Oct 2016
Posts: 1

I've got the same problem exactly after I bought my 05 CTS, I usually hear the rumbling noise and ticking sound after I start the engine every morning. Then after the car temperature has reached the middle the noise goes away. Can anyone help me find an answer to get rid of this noise. :-(
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