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High Pitch Tone From Rear

This is a discussion on High Pitch Tone From Rear within the Drivetrain forums, part of the LSx Technical Help Section category; I have a high pitch tone coming from my rear... It only happens on really hot days and it temporarily ...

  1. #1
    Preferred Member CWW17's Avatar
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    High Pitch Tone From Rear

    I have a high pitch tone coming from my rear... It only happens on really hot days and it temporarily stops when I turn left... Any ideas??? Also if I turn off the car and let it sit for awhile it wont be there when I turn the car back on... Its not coming out of the exhaust tips, but under the rear of the car...
    Last edited by CWW17; 05-11-2007 at 05:10 PM.

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    Veteran 0rion's Avatar
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    06 duramax

    sounds like fuel pump bearings to me. Mine used to do the same thing. It was very intermittent but when it did make a racket it was almost always on very hot days. Sounded like a small electric motor running or something like that. Very hard to describe the sound. Anyhow, from the time I first noticed it I ran the car another 3 years before replacing the pump and even then it wasn't bad. Just replaced it while I had the rear out.

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    Preferred Member CWW17's Avatar
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    yeah that sounds right... Thanks I'll have it checked out!

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