Seems like I’m experiencing what many others are experiencing. Bought my truck (2019 5.7 Big Horn 4x4) new a few months ago. Just about 2 weeks ago I started hearing a noise as if a small single engine airplane was coming up behind me as I was letting off the accelerator while driving. I’m about to take a pretty long road trip and am hoping this isn’t something major. Any answers about what this could be?