Just bought a 2011 Silverado crew cab that is 4x4, but not Z71. I really wanted the Z71 package, but couldn't refuse the great deal I got on this truck. Just wondering if there is any significant difference between the two? If so, is it possible for a Z71 conversion, or would that just be a waste of time. I think the Z71 decal dresses it up and looks damn good, but I would never throw a sticker on there if its not a true Z71. I don't do any extreme off roading, but I do get off the paved road quite often at the farm. I just want to be reassured that my truck will be able to handle some offroading if I need it to.