Silverado hybrid?

[carpoor]

For the new and used car people here, how do I easily identify one of these? I have found a few 2009 & newer online. 6.0L V8, and 20+ MPG. I'm sold, just need to find out if I can realistically afford a used one. With my new job, I can expect to drive around 30,000 - 35,000 miles a year. It could be a huge savings on fuel for me. My 96' gets around 15 - 15.5 MPG average. It's just not going to cut it - even getting per diem.