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plz help with fuel pump/ blinker noise

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Old Feb 20, 2012 | 10:16 PM
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Default plz help with fuel pump/ blinker noise

So I have a 98 a4 noisy fuel pump which I'm use to but when I use my blinkers I can hear the noise from fuel pump going on ,off just like the blinker is there any way of quieting this noise or getting rid of it besides replacement of fuel pump its driving me crazy thanks
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Old Feb 20, 2012 | 10:34 PM
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The fuel pump on the C-5's are noisy -- To compund the issue it is 24" behind you!! Almost all other vehicles it is 6' behind you so even if it did make some noise you would never hear it. I know mine will be a little louder if I'm below a 1/2 tank of gas.....the air space doesn't dampen the sound like a full tank would.

There are many write ups on changing the fuel pump - not too hard from what I see on the earlier C5's.
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Old Feb 20, 2012 | 10:49 PM
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About a foot to the right of the steering wheel there is a **** that when turned to the right about 3/4 a turn will cover up the fuel pump noise. Works best with a lil Steppenwolf 'Born to be Wild'.
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Old Feb 20, 2012 | 11:17 PM
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You are a 1%'er -- you actually use your blinker!!!
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Old Feb 21, 2012 | 08:47 AM
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Originally Posted by Yellowstang73
About a foot to the right of the steering wheel there is a **** that when turned to the right about 3/4 a turn will cover up the fuel pump noise. Works best with a lil Steppenwolf 'Born to be Wild'.
Lol I know right
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Old Jul 11, 2025 | 10:58 AM
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I can't believe I found somebody who actually has the exact same fuel pump noise issues as me. My turn signals also fluctuate the noise. Did you even find a fix for it?
Please post here and send me a PM to my email. actionemail@yahoo.com
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Old Jul 11, 2025 | 11:08 AM
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Sometimes, I just like to hear the purr of the Engine's Corsair exhaust without any sound input from my fuel pump or radio. Anybody actually have an alternative fix for this annoying noise other than the GM factory recall fix which is, of course, not available any longer?
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Old Aug 22, 2025 | 02:31 PM
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I'm on my fourth fuel pump. They all make a loud noise and pulse to the beat of my turn signal flasher. Changing the pump has been a waste of time and money for me. I need a real fix as the noise is so loud, that's all I can concentrate on when I'm driving the car. ANYBODY/ HELP!!
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Old Aug 22, 2025 | 03:26 PM
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Originally Posted by tdoriausername
I can't believe I found somebody who actually has the exact same fuel pump noise issues as me. My turn signals also fluctuate the noise. Did you even find a fix for it?
Please post here and send me a PM to my email. actionemail@yahoo.com

That member hasn’t been active on the Forum since 2012 so I doubt he will be contacting you.
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Old Aug 22, 2025 | 03:45 PM
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If you’re on your 4th fuel pump it’s NOT the pump !!…the ground G401 is the ground for the fuel pump AND the rear tail/stop/turn lights…G401 is on the left frame rail inboard of the left rear tire and you can see it if you peek in there…if you have a bad ground the pump may be struggling to run with that increased resistance… that may be your issue…I have the pump and rear turn signal wiring diagrams below…there is a splice pack in that circuit which may have high resistance..I don’t know if you know how to read a wiring diagram…if you have a test light the ground can be checked but a high beam bulb would be better to use…you’d have to access the fuel pump connector and disconnect it to check.




Last edited by C5 Diag; Aug 22, 2025 at 03:56 PM.
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Old Aug 22, 2025 | 03:51 PM
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There was a TSB concerning these noisy pumps but all they said was to change the pump…you’ve done that 4 times.



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Old Yesterday | 04:38 PM
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CarCam: I have to put in my two cents and say changing the pump won't help. I have on my fifth pump. They all start whining on a hot day after driving a long distance.
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Old Yesterday | 04:40 PM
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It is my understanding that this part kit is no longer available. If you know where I can get one, please let me know. THANKS
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Old Yesterday | 05:19 PM
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Thanks for letting me know. I suppose that if he did find a solution, he would have posted it before he decided to discontinue posting on the forum.
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Old Yesterday | 08:39 PM
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Very funny. I actually tried that but you know, the noise is so loud at times that the radio does not drown it out. I like Hotel California myself. : <)
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Old Yesterday | 09:47 PM
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Properly hard wire the fuel pump using a large diameter wire and unnecessarily large relay
Simply take the original fuel pump wire as the relay activation for the new wire set

in a performance vehicle the fuel pump should be fed and grounded by itself using much larger relays wires than necessary
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