Squeak/Rattle/Rub noise in rear while in drive

[cmont1065]

I have a 2020 Sierra 2500 AT4 with the 6.6 Duramax Diesel with 3800 mi. It doesnt occur while in reverse, and seems to be a recent issue. While its not a loud noise, its definitely there and just curious if anyone else has heard this. Seems to be coming from the area of the rear end under bed

 

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