conductor79
New member
I have a 2011 Sierra with 17,200 miles on it. Last weekend I did a 3M paint restoration on it.(nice results/lots of work) I noticed 2 things. The wheels around the outside rim have started to corrode and or oxidize. And the undercoating on the frame is just peeling off. I contacted the dealer and he said there was a bulletin on the undercoating, and did take pictures of the wheels on the truck Wondering if any others have dealt with these two items