I had the same ...problem.... with my 2025 2500HD—about 1 1/2 inches difference between sides, as shown in the pictures—back in May 2025. I measured the height in multiple spots wheel well, frame, bumpers name it and at different locations, driveway, street garage fuel station etc to make sure it was consistent, and it was. Now it’s January 26, and 6,000 miles later, everything is fine. I’m pretty sure my last trip from Montreal ( fifty first State ) to McAllen Texas, fully loaded with my 8,000 lb travel trailer and 1,150 lbs on the tongue, played a big role. Maybe the truck just needs to be loaded to get everything back in place? Now I just need to address the rear suspension noise—it’s creaking a lot even when just climbing into the cab