I have 2023 Denali Ultimate. I am noticing a sound coming from the center of the dash when I go over bumps. It sounds like the noise you would get if something is loose and bouncing in the cargo area…only from the dash. My guess is the center channel speaker. I already had to have the drivers door panel replaced for a rattle caused by too much space between the panel and the window. The dealer fixed that problem but said they couldn’t hear the dash issue when they test drove it. At the time I wanted the vehicle back to see if door issue was resolved and didn’t have time to deal with the dash. Will have the dealer check it out again but thought I would check here to see if anyone else has had similar experience. I am not crazy about the idea of taking the dash apart. Thank you
I have the same issue on my 2022 GMC Sierra Denali, which has the same/similar dash as the Yukon Denali. I only have 6K miles on my truck the noises started in the cluster and dash (instrument panel GM calls it) when temperatures started reaching 72-75+ degrees casuing the plastic to expand/contract. I also have a rattle in the driver-side door (seems to be around the speaker) that the dealership claims they cannot replicate but occurs every time I'm on the interstate and hit bumps or rougher roads. It stops if I press a against the speaker.
I have taken my truck to the dealership a total of 5 times now. On my 2nd visit, they claimed they could not replicate the dash plastic popping noise (which is false) but replaced the dash anyway (seems suspect to me, if they claim they could not duplicate the noise) After replacing the dash, the noise is still happening and driving me crazy! I have taken my truck in 2 more times since the dash was replaced and they still claim the noise cannot be duplicated. I told the dealership they likely wouldn't hear the dash noise at this point because the highs were only 65 degrees.
I contacted GM customer care at the recommendation of my sales rep but have gotten nowhere with them. They claim they could get a structural engineer out but it remains unknown if it will happen. Now we are well in fall / soon winter so the noise in the dash will not occur as often because the heat is what makes the plastic contract/expand and causes the popping noises. In my opinion, the issue is a defect for GM and so far they are not willing to take ownership of the issue. Meanwhile, we all spent 75K+ our Denalis and likely won't find a resolution or provide buy-back options unless other individuals with this issue start getting GM's attention. I even provided several videos of the dash noise occurring and that did not help my case because they say they cannot duplicate the noise. If you have this issue, take videos, get to the dealership, and make it known!