Getting a roof rack on a 2013 Chevy Silverado?

[Jerry Waters]

My brother just picked up a 2013 Chevy Silverado and we are trying to figure out how we can get a roof rack on the top of this thing. There isn't much you can fasten it too. Any suggestions?

 

[BootLeg JK]

Do you have the lip on each side of the roof to clamp down on? I can't recall with that truck.