I have been having a high-pitched whine when the truck is under a load at around 3000 RPMs. I can’t figure out where it’s coming from and it sounds like some kind of air leak but I’ve been unable to pinpoint it or catch it on video. In the mornings I’m also smelling that sweet exhaust smell when the truck is warming up way more than I have in the previous years which leads me to think I may have an exhaust leak. I have a 2016 with about 120,000 miles on it. Anyone have any Ideas on where to start?