Question about 2004 Cadillac CTS

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Can someone tell me what that whining noise I hear from my 2004 cadillac cts but once the car is warmed up the noise go away. Can someone give me some info, I want to get some advice before I take to a shop.

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  • terrianac May 14, 2009

    yes when I turn the wheel the noise gets louder.

  • terrianac May 14, 2009

    jebuck55 now I only hear this noise in the morning when I first start my car then when I make turns the noise gets louder but like I said before the noise stops once the car warms up. Thanks for this information I will be able to talk to the mechanic before they charge me an arm and leg for something else

  • Jerry Koski
    Jerry Koski May 11, 2010

    tell me does the noise change when you turn the wheels ? just wondering if its the powersteering pump making this noise ? if so holler back at me will tell you what to do next.. thanks Jerry



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Hey before you take it to a mechanic shop if you could drain off some of the powersteering fluid with a suction device and add some Lucas powersteering additive this would probably take care of it in time.. after some driving .. would save you alot of $$ Lucas is best for this problem.. just use a suction device stick it down in the powersteering pump hole where you check the fluid and **** out as much as you can then add the lucas to fill back up and drive a few days and presto.

Posted on May 14, 2009

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It may be the air pump. There is a small electric pump that pushes fresh air into the catalytic converter to keep the emissions in check before the car warms up. The gm part is an AC Delco made in China part that breaks quite often.

Posted on May 14, 2009


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Posted on Jan 02, 2017

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SOURCE: Can someone tell me what that whining noise I hear

Can't really do better than a guess ...noises I can't hear aren't my specialty. It could be the bearing in the front of the alternator...when you first start up the alternator is loaded, as it puts power back to the battery that you just used when starting. You hear it more in the AM because you are standing still, the engine is cold and needs more power to start than when warmed up, and the battery has lost some power keeping clock etc going all night. During daytimnes starts the length of timne it needs to do this is shorter and requires less demand. (long explanation for a guess!!!) Either way should not be anything horrible! Trans may also be low on fluid.
good luck

Posted on May 27, 2009

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