Not all 02's are the same height. Only the earlier ones were taller. But if you add a 3" lift they all are the same. Generally speaking, 02 to 04 are the same, 05 to 07 are the same, then in 08 there was a body change making them a KK instead of being a KJ.
I think it was in 03 that they changed the transfer case. There was 2 types of TC's used. One had Full time 4X4 and one doesn't. Both have 4Lo.
From 02 to 07 they are basically the same. The major changes in the bodies are cosmetic, such as the front end. There were a few inside changes as well.
Terry
corrections appreciated.