Engine compartment noise

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AMGguy

New Member
Joined
Aug 4, 2015
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Location
Houston
Purchased a 03 5.3 Tahoe last night. The drive home went smoothly but when we parked we noticed a sound that had not been present for numerous tests drives. I uploaded the video here https://www.youtube.com/watch?v=kB2PY0qrSLs&feature=youtu.be. I know the video quality is poor I was more concerned with being able to convey the noise.

What could be causing this?

Thanks in advance
 
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