So on my '15 Crew Z71, I've notice the last few years that when the weather is cool or cold and I first get in and begin to drive somewhere, anytime I hit a bump or speed bump (like on our work campus), the front in makes a crunchy/farting noise (yes, I said farting... for lack of a better term). Sounds to me like rubber against metal. I assume the rubber contracts when cold and causes this noise. If above 50° or so outdoor temp it doesn't do it. And the colder it is, the more pronounced the noise. Any ideas as to what it is? Shocks? Some other joint in the suspension? Seems to be getting a little worse over time so I'd like to remedy it if I can. About 96k miles on the truck. I'm hoping it's something simple. Thoughts? Experienced it?