I've still got a brand new set of Hawk LTS brake pads (front) that I was going to put on the Suburban. I think I bought them in late summer/fall 2011, but the truck got totalled before I had a chance to put them on.
AFAIK, they will fit just about any 1500 Tahoe/Suburban/Avalanche/Yukon from 2007 to current, and most 1500 Sierra/Silverados from 2005-2011. The part# is HB561Y710, so check for your particular make & model to be sure.
Pads are still brand new and wrapped in the factory plastic. They sell on autopartsway for around $100, but I'll sell them for $50, including shipping anywhere in Canada.
For those not familiar with Hawk, you can check out the LTS pads here:
http://www.hawkperformance.com/truck/lts.php . I never got a chance to try their truck pads, but if they're half as good as the car pads, you won't be disappointed.