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2013 Chevrolet Suburban
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2000 Suburban 5.3L - Unsolved engine noise/rattle

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Old Aug 13, 2019 | 1:33 PM
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wc27coker's Avatar
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Default 2000 Suburban 5.3L - Unsolved engine noise/rattle

Does anyone know what this noise is (wait until the last two revs)? https://www.youtube.com/watch?v=Prl3...ature=youtu.be

It's intermittent, and does it about 25% of startups. It usually does it after its been sitting for a few hours, never at idle, and for the first 5-10 seconds or so of driving, and then it goes away. It has recently gotten worse, but not alarmingly bad. I'm at a loss.
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Old Aug 13, 2019 | 2:11 PM
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Originally Posted by wc27coker
Does anyone know what this noise is (wait until the last two revs)? https://www.youtube.com/watch?v=Prl3...ature=youtu.be

It's intermittent, and does it about 25% of startups. It usually does it after its been sitting for a few hours, never at idle, and for the first 5-10 seconds or so of driving, and then it goes away. It has recently gotten worse, but not alarmingly bad. I'm at a loss.
Can you pinpoint a general area? Watch the belt while you do this, particularly where the tensioner is and see if it's vibrating or shaking when the noise is being made.

If all looks good there, take a mechanics stethoscope and probe various locations until you find where it's coming from.
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Old Aug 13, 2019 | 3:01 PM
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It sounds like on the bottom of the passenger side of the motor. After some more research, I believe it's related to the AC system. I'm hoping it is the AC tensioner pulley bearing which is a pretty simple fix. I'll investigate tonight and keep you posted.
Thanks
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