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2023 Sierra 1500 Rear Seat Rattle Noise ?

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mvf969 Enthusiast

mvf969

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I had the same issue in my 2023 High Country it sounded like I was chased by the rattle.  I thought it was the seat or the belts but it turned out to be the cabin pressure vents.  Apparently there are rear pressure relief vents in the back of the cab behind the seat.  They are supposed to be glued in and mine were not so they just rattled.  My dealer found them after they took out the rear seat and the rattle was still there.  It took them a couple of days but four months later no rattle.  If you are curious my Silverado was assembled in Mexico and mine was the first but they have two more from the same assembly plant with this issue.  I hope this might help.

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