In my search for stainless brake line tubing for my boat trailer, I ran across the following. If you scroll down on the page there are in excess of 490 posts.
http://trucks.about.com/b/2011/08/01/brake-line-corrosion-suspected-in-gm-trucks.htm
http://trucks.about.com/b/2011/08/01/brake-line-corrosion-suspected-in-gm-trucks.htm