I just went to a shop today and had them order a ready lift leveling kit for my 2012 silverado 1500. I've been reading a lot of threads on here and notice people are using several different inch sizes. My truck is 4x4 and has the Z71 package, and I told the shop to order me a 2" level kit, but now that I'm seeing they make 2.25" and 2.5" how do I know which size will make the truck the most level? I read that the Z71 adds a 2" block to the back, so I was assuming that adding a leveling kit of 2" to the front would make it match but now I'm unsure. Thanks for any help.