Randy Lyons

I have a 2024 Sierra SLT with an incredible amount of roof panel flex. While going through the dryers in car wash the roof panel vibrates creating a drumming and oil canning sound. When waxing / washing roof by hand the roof panel flexes over 1/2” with very little effort. As a vehicle white body structural engineer for 37 years I’ve never experienced anything like this as being acceptable by design. Normally there are roof arches with sealant between them and the panel or at the very least a self adhesive melt sheet that stiffens as it goes through paint ovens. My brother-in-law has a 2022 Silverado that does exactly the same thing. I can see where this constant flexing can cause weld or material failure in the future. I can’t find anything on the web related to this. Has anybody else in the truck community experienced this?