Hope this makes sense to y'all

I was reading a new magazine last night (mens' health). Two page advertisement from Chevy. "345 HP Vortec Max" now available in Ext Cab and Crew Cab 1500's. I went to the Chevy website but didn't see the option yet. Does this mean I have to trade in the Squirrel??? only prob with that is they don't offer Dark Grey Met. anymore. The truck in the magazine was a CCSSB like mine but a 4x4. I'm wondering if you can only get it in a 4x4. Anyone else heard anything about this?

Jason