Question about 2001 Cadillac Sts

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Humming noise in front end/engine fo 2001 Cadillac STS

When driving down road, the car make a humming (like a single prop plane) noise, when you slow to about 5 mph the noise stop and does not make noise when idle. Any ideas?

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  • 6 more comments 
  • bcdplumb Feb 27, 2009

    This is a new noise, car has 148,000 miles, not sure about the fan.

  • bcdplumb Feb 27, 2009

    It is electric

  • bcdplumb Mar 02, 2009

    Would a bad wheel bearing make this "vrvrvrv" noise?

  • bcdplumb Mar 05, 2009

    You really start to hear noise about 40 mph, when you slow to about 5-10 mph it will stop. Clunking noise when turning right, so we assume it is the left wheel bearing. I purchased both right and left hub units yesterday $158.00 each. might as well replace both this weekend.

  • bcdplumb Mar 09, 2009

    Replace wheel bearings. Noise is gone. Problems solved!

  • Mike Butler
    Mike Butler May 11, 2010

    Is this a new noise to you, and what type of fan set-up do you have on your rad, is it electric, or clutch type fan?

  • Anonymous Mar 14, 2014

    car shakes and makes noise after 60 mph on interstate does fine on side roads Its almost like its clogged up

  • Anonymous Mar 30, 2014

    2001 suburban makes humming noise after ignition turned off

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  • Cadillac Master
  • 6,674 Answers

Keep an eye on your temperature gauge until we figure this out, just in case & see if it climbs much/any at highway speeds.

Posted on Feb 27, 2009

  • 2 more comments 
  • Mike Butler
    Mike Butler Feb 27, 2009

    Try this, start car and let it idle in park, until fan kicks in, sit in car & see if noise is same ?

  • Mike Butler
    Mike Butler Mar 03, 2009

    Yes a wheel bearing would make similar or same noise too. I don't know why I was thinking cooling, except that I thought there was something about engine temperature on the heading or somewhere in the posting, but I don't see it now, sorry? Do you hear the hum at all at slow speeds, while turnings corners at all, or swerving slightly?

  • Mike Butler
    Mike Butler Mar 06, 2009

    Wise choice, as it's not uncommon for one to go shortly after the other. That I doubt very much would cause the clunking you mentioned though. Might want to inspect CV joints while at it for play, or rip in boot.

  • Mike Butler
    Mike Butler Mar 10, 2009

    Thanks for update & rating , Much appreciated.

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