Well...apparently the manufacturer forgot the screws
Shout out to Donny at Meyers RVs in Harrisburg, PA, who brought his mobile workshop to my RV storage site and repaired the damage.
He pulled the trim off and discovered that there were NO screws down the side of the front panel. securing it to the frame.
Road vibration (and maybe pressure from my JT StrongArms attachment point which apparently bent the floor of the front storage pan) eventually separated the lower front panel from the side. Screws along the top portion of the front panel are also not attached to the frame.
Donny found some long screws, pushed the front panel back in place and secured the side and the bottom. Now tight as can be, no more movement and everything looks great! I''ll put some sealant around, check the other side and add screws as necessary and will be good to go.
Juniorz--may be worth checking on yours. Simple fix, I hope.
2012 Chevy Silverado 2500HD