Rattle noise

[2025 Denali]

I have a 2025 GMC Sierra Denali. I have 1000 miles on it. Since I picked it up from the dealer I have a rattle in the vents. It migrates from left to right but for the most part you hear it in the middle. It does not rattle if you are not accelerating. Does not rattle at Idel.  Its driving me nuts. Brand new truck with a rattle. No I have not taken it to the dealer. I have read on this forum that others have the same issue, however on older models. i had a 2006 SLT best truck i ever owned. Stolen off my driveway in Jan of 24.

 

Any Ideas?

[mafd2]

6 hours ago, 2025 Denali said:

I have a 2025 GMC Sierra Denali. I have 1000 miles on it. Since I picked it up from the dealer I have a rattle in the vents. It migrates from left to right but for the most part you hear it in the middle. It does not rattle if you are not accelerating. Does not rattle at Idel.  Its driving me nuts. Brand new truck with a rattle. No I have not taken it to the dealer. I have read on this forum that others have the same issue, however on older models. i had a 2006 SLT best truck i ever owned. Stolen off my driveway in Jan of 24.

 

Any Ideas?

Can you describe the rattle? Can you record it? Sit you check that sun visors are snapped in? Seat belt buckle hitting pillar trim? Sounds can travel and be deceiving. You'd swear it's coming from one area when it's not.

[Chris828]

I bet you will most likely find the rattle coming from the o2 sensor plug under the driver side next to the transmission. Give it a look and see if it's hitting the tunnel like mine was.