My 2017 with 35K on has developed and obnoxious squeaking noise coming from the area of rear suspension. While I am pretty certain that it is not leaf springs or shocks, I can locate the source of the sound. Listening close to shock mounts and leaf spring bushings doesn't seem like the cause. To me it sounds like a rubber rubbing against metal. Likely dirt stuck somewhere. I have washed and lubed every place I could find and some of the noise went away. My best guess is that it is coming from places where bed mounts onto the frame. Hoping that someone was clever to have this issue and found exactly where dirt is collecting causing the noise. I suspect that frequent offloading will continue to cause the noise so any help from someone that experienced it would be awesome. Ideas appreciated. Moving bed up and down is how I recorded the sound. Video amplified the sounds so it really sounds much worse than it really is.
https://photos.app.goo.gl/XYrmZETLenLrWKFZ7
https://photos.app.goo.gl/XYrmZETLenLrWKFZ7