I noticed a while back that the front and rear bumpers on my 2010 gmc 2500 are rusting. Every little rock knick has a rust ring and lots of spots where there are no knicks is rusting!! I have seen this on 2009 half tons, 3/4 tons as well as 2010 models. I was told today by chev in lloydminster that they will replace my bumpers and running boards but only once as GM tells them that the rust is caused by the "truck owner" not drying the chrome bumpers after washing the vehical. Oh....and they only put one layer of chrome on where as before they would use 3. Not very happy right now, i only have 45,000km on the truck and i know the new bumpers are going to rust the same. I will post pics as soon as i take some.