whistling/Humming sound at 40mph, only during acceleration

[Bcox]

I have an 03 z71 and i get a humming/whistling sound when I get to around 40mph. Only hear it as I accelerate. If I take my foot off the gas the noise goes away, then comes back as I accelerate. I've done some research and some say it could be the carrier bearing, or a pinion bearing???? Does this sound accurate to anyone? Has anyone experienced this? Thank you

 

[PG01]

Does it clunk on/off the gas? Or no clunk and just whine? Does it do it in neutral at speed? Or just drive?

 

[Bcox]

No clunk, just a whine. Doesn't do it in neutral only when I reach around 40mph during acceleration. If i let off of the pedal it stops, but then when I press on the gas again it starts. Its literally just during acceleration after reaching 35-40mph

 

[shreksbrother]

Have you considered the possibility of the intake manifold?

I would have bet money that I had a failing bearing (and I'm a pretty accomplished shadetree mechanic). After nearly a year of that sound driving me crazy, I read another member's post about their intake manifold gasket possibly causing a similar sound. I replaced my intake manifold gaskets over the weekend and my ears are SO thankful. Plus my Yukon runs infinitely better!

 

[Tonyrodz]

I have an 03 z71 and i get a humming/whistling sound when I get to around 40mph. Only hear it as I accelerate. If I take my foot off the gas the noise goes away, then comes back as I accelerate. I've done some research and some say it could be the carrier bearing, or a pinion bearing???? Does this sound accurate to anyone? Has anyone experienced this? Thank you

My gf is complaining about the same issue. Do you need to have your window down to hear it? Or do you hear it with the windows up?

 

[Bcox]

i hear it with windows up

 

[PG01]

I got it ....whistling and humming because it doesn’t know the words to the song.... is your radio working?

 

[HACK BLOCK]

I have an 03 z71 and i get a humming/whistling sound when I get to around 40mph. Only hear it as I accelerate. If I take my foot off the gas the noise goes away, then comes back as I accelerate. I've done some research and some say it could be the carrier bearing, or a pinion bearing???? Does this sound accurate to anyone? Has anyone experienced this? Thank you

I hear the same exact same sound.

 

[RGA1215]

My 01 Tahoe has been doing the exact same thing as long as I’ve had it (1 and a half years). It starts around 40-50 mph, and then it starts doing it again at a higher pitch at around 70-80 mph. And mine only does it when I press the gas as well.

 

[mnjeepmale]

I have 01 and mine does the same. But I think it's a idler pulley.

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