Chevy truck bumper rusting

custom3

I have a 2010 2500hd and the rear bumper is rusting on both ends.My dealer tells me its no longer under warranty.I bought the truck new and it started at 1 year old but was polished out by the dealer.Now it won't polish out any more and I'm out of warranty.Has anyone else experienced this problem?

custom3

I should add,,,the truck only has 20,000 miles and is always garaged

KCRam

We had a previous discussion on this subject:
Chevy Silverado and GMC Sierra Rear Bumper Rust

KCRam - Pickups/Wagons/Vans+Minivans Host