u/Direct-Ad7267

l've got a 2022 GMC Acadia with the 2.0 turbo (LSY), about 30,000 miles.

I'm hearing a rustling/shuffling noise from the engine at idle. When I rev it up, the noise increases with engine speed and then disappears. As soon as I let off the gas, the RPM drops back down and the noise comes back just as quickly.

l've already removed the serpentine belt, but the noise is still there. I also dropped the oil pan and everything looked clean inside.

Has anyone run into something like this before? Any ideas what it could be or how to fix it? I'd really appreciate any input.