on May 28, 2013
I bought the boards via Westin's Outlet store (the ONLY way to buy them at about 1/3rd the cost). Strangely, they don't offer mounts there so I found them here on Amazon.
Fit like they were made by GM. Instructions not real clear, but worked perfect. At first the screws that go into the body mounted nuts don't seem to be the same thread, but don't worry, they are.
The boards and mounts are outstanding, couldn't be happier!