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Old 03-21-2008, 10:48 AM   #1
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high pitch whining noise..

I have a 1996 chevy tahoe, 5.7 liter. When traveling in warm to hot weather, there is a high pitch whinning noise under the car, happens even if not towing. Anyone had this problem and if so how did you solve it. Thanks
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Old 03-21-2008, 10:52 AM   #2
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Sounds like you need to call Click and Clack.
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Old 03-21-2008, 11:10 AM   #3
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Alternator?
Transmission?
Could be lots of things.
If you have a mechanics stethescope or just a wood dowel, you can probably isolate it to an area or item.
Good luck.
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Old 03-21-2008, 11:19 AM   #4
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Is it there regardless of speed?

I'll suggest fuel pump...

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Old 03-21-2008, 11:23 AM   #5
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Quote:
Originally Posted by BillTex
Is it there regardless of speed?

I'll suggest fuel pump...

Bill
I'll second the fuel pump suggestion. Especially if it has ever been replaced, they tend to hum, buzz, and howl whenever the engine is running, whether the car is moving or not.
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Old 03-21-2008, 11:25 AM   #6
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Does it happen all the time. Or is the annoying noise only when the other half is also in the truck....
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Old 03-21-2008, 02:53 PM   #7
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Fuel pump. noise is good. no noise, oh oh, no start and ka ching ka $chingaling. Keep your fuel tank over a quarter full to keep coolant on the intank fuel pump.
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Old 03-21-2008, 03:31 PM   #8
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I had the same problem on my 95 burb. see if it is louder when the tank is low.
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Old 03-21-2008, 03:52 PM   #9
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Quote:
Originally Posted by NevadaGeo
Fuel pump. noise is good. no noise, oh oh, no start and ka ching ka $chingaling. Keep your fuel tank over a quarter full to keep coolant on the intank fuel pump.
My last GMC started whining when it reached 90k miles or so...
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Old 03-21-2008, 05:53 PM   #10
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I have a Tahoe 2002, the rear diff gets low of the 90 weight oil and the the gears will have a whine. I had a leak after a repair and found that the gear housing was low. quieted down when I added some.
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Old 03-21-2008, 06:59 PM   #11
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jayray5..question

Quote:
Originally Posted by jayray5
I had the same problem on my 95 burb. see if it is louder when the tank is low.
can you tell how you solved your problem?? And no to your question to me.
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Old 03-21-2008, 07:11 PM   #12
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solved it

My problem was a bad fuel pump--I replaced the whole tank, start up your truck and put a long extension (metal or even a broom handle) up against the tank. If you feel the vibration that is it. Put it to your ear and you will hear the whine.
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Old 03-21-2008, 07:49 PM   #13
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My father had a vac. leak at the tranny that had the same noise. Sounds alomost like you got a turbo at low speed...?
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Old 03-21-2008, 08:39 PM   #14
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Whiney sound

Mine is caused by the power steering pump (1990 GMC van).
It sounds like a turbo charger all the time the engine is running also.
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