NHTSA Complaint #11583939 — 2014 CHEVROLET SILVERADO 1500

I have a 2014 chevy silverado that I purchased brand new from the dealer. The truck just hit 100,000 miles and recently had a clunking noise from the rear undercarriage. After having it inspected, it has come to my attention that the frame is rusted and rear crossmembers are rusted out causing the rear shock mount to break, and I'm not sure if the frame is salvageable. After doing some research, I found a recall for my year silverado for the undercoating on the frame(not properly done from the factory) but my VIN is not in the recall. I'm at a loss being the year of the vehicle and mileage on the truck considering it might be undeliverable and unfixable