CosmicTrucker

Thank you for this information. This looks like the fix I’ve been waiting on. I was very hesitant to have my dealer dig around experimenting on my truck needlessly.

I'm still under warranty with the hope someone reports back with the fix before I hand the truck over for exploratory surgery

My 2022 purchased 12/21 z71 started doing this around 5-7k miles with 18k on the clock now. I noticed that it takes about a half hour of driving around town or out on the highway before the scrapping noise starts. Sounds a lot like a rock in a brake caliper. I quickly learned that putting the transfer case into 4auto would instantly stop the noise. I was advised by the sales person to only run in 2hi until I needed 4x4, so that's what I've done from the beginning of ownership at 22 miles. I'm the sole driver. To me since this is clearly related to the transfer case, that it must be something not set or shimmed correctly. I'm very hesitant to report this to my dealer until I'm confident they have found a true fix. I don't want them doing research and development on my dime.