Thread: 2004 GTP - hearing rather loud humming noise...............

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  1. #1 2004 GTP - hearing rather loud humming noise............... 
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    starts when accelerating at about 25-30mph and then gets a bit louder as car continues to accelerate. Humming noise continues at same level when decelerating, at least for a while, then decreases when speed gets down to the 30mph (or so) level. No noise when stopped.

    Any thoughts? Thanks.
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  2. #2 2004 GTP - hearing rather loud humming noise............... 
    Grand Pricks cameron92's Avatar
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    Most likely a wheel bearing. Does it get louder when you turn left or right?
    Last edited by cameron92; 01-04-2012 at 04:02 PM.
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  3. #3 Re: 2004 GTP - hearing rather loud humming noise............... 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Wheel Bearing...................
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
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  4. #4 Re: 2004 GTP - hearing rather loud humming noise............... 
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    Thanks. Already replaced 2 in the last 6 months. This sounded different, but will look into.
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  5. #5 Re: 2004 GTP - hearing rather loud humming noise............... 
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    No, the noise stays the same in any turns, left or right.
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  6. #6 Re: 2004 GTP - hearing rather loud humming noise............... 
    I live here. SlowNA06's Avatar
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    Where's the humming seem to be coming from? Does it change with RPM? If you posted a video clip with the noise, we could help better.
    Irridium spark plugs last 100k mi and work just as well as copper. Copper is a waste on N/A and only lasts 15k mi. Don't use Platinum.
    Use 195* tstat unless you can thoroughly explain why not; 99.9% don't need a lower temp.
    Almost any oil filter, ever, is of higher quality than ACDelco. Spend $6+.
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  7. #7 Re: 2004 GTP - hearing rather loud humming noise............... 
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    Does not change with RPM, changes on car velocity.

    I think the previous posters probably nailed it, a bad wheel bearing. The more I listen to it with the car in operation, the more that makes sense.

    Thank you to for all the help!!!

    btw, is the wheel bearing something I need to get replaced asap or can it wait a week or two?
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  8. #8 Re: 2004 GTP - hearing rather loud humming noise............... 
    SE Level Member TheManInBlack's Avatar
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    yea you could wait i have the same problem with my gp, and im waiting till my garage is open
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