Question about 2002 Chevrolet Suburban

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HOwling noise from 99 Suburban 4X4

We have a 99 Chev Suburban 454 4X4. When you are dring, not all of the time, it makes like a high piched howling noise. It gets louder the faster you go. The temp and battery are fine on the guages. It drives great, no other issues. Any ideas?

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  • brieferland Oct 18, 2008

    No. It slows own when the truck is slowing down. I don't think it's the drivetrain because you can still hear it when the truck is stopped... It sounds like it is at the front end of the truck, just can't pinpoint it.

  • ricksvideo Mar 24, 2009

    I also have a 99' 4x4 Suburban.I will be accelerating 20-35 MPH, and when I take my foot off the pedal I hear this grinding noise. It goes away when I start accelerating again, but comes back when I let my foot off the gas. It does Not happen when I am accelerating.My mechanic thought it might be the U-joints,but he checked and says they are OK.Also makes noises when I go over a rise or a dip.225K Miles.Maybe time for a Tranny Flush and FIlter? Haven't done it for at least 80 K.(Duuhh?)Driving me crazy.Chevy dealer itching for me to bring it in so I can help him stop his foreclosure LOL. Any help appreciated. Thanks

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Might be one of your catalytic converters clogging up. usually happens after engine has been running for a time? mostly heard when you let off the gas pedal? does the noise appear to be coming from the transfer case area? i thought i was having tranny problems, but turned out to be one of the catalytic converters. whew....

Posted on Jan 13, 2009

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I have a 1997 2500 4x4 Chevy suburban that made a high pitched whistling noise and it was the power steering pump. Now its making the same noise and it gets louder as I go faster. It sounds like it must be the transmission but not sure. Its embarrassing cause its so loud that people stop and look.

Posted on Sep 15, 2012

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Sounds like a power steering issue. Check the Power Steering fluid. When your parked, roll down your windows (so you can hear it). Turn your steering wheel all the way to the right then all the way to the left. From lock to lock. Listen for the howling. My bet is. its your power steering pump low on fluid or starting to fail.

Posted on Sep 27, 2011

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I am having a similar problem with my 95 Suburban 4x4. However when I accelerate to 30 - 35 I hear something that sounds similar to the power steering pump being out of fluid. This sound only occurs after I reach 30 mph, when I let of the accelerator the noise quites down and will stop altogether when I slow under 30. It doesn't happen when I turn the wheel unless I'm already going over 30 and the noise is there already. (the ps fluids are fine.) The tranning seems to be shifting fine and the RPMs are normal when shifting. Any advice would be appreciated.

Posted on Oct 26, 2009

  • kandrfarms Jan 07, 2011

    i am having the same problem and cannot for the life of me figure out what it is. just put all new u joints on the drive shafts and did not fix problem

  • Kevin Sep 27, 2011

    This sounds like your rear end gears. Gear whining. Your gears need to be adjusted or are just worn out.

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  • Chevrolet Master
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Does it go away when you turn, or swerve? Have you tried blocking the grille? Sound like its from front or back, or can't be sure?

Posted on Oct 18, 2008

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1 Answer

Rear end making a howling noise already changed the front and rear u-joints. still making the noise only happens over 60 mph


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