Google is your friend. :happy: https://www.google.com/?gws_rd=ssl#q=stainless+steel+brake+lines+2006+silverado
Looks like Dorman makes a kit. They also give the OEM part number which I ran on eBay and found a few stainless steel kits.
The reason I ask is the other day I got the message that it was not charging. Before I could look at the gauge the message went off. I never really paid much attention to the gauge but it seems to take its sweet time to get to the 14V mark even when the truck is hot.