So I got a really good deal on my truck and my stupid ass didn't know until after I bought my vehicle that it had the single speed transfer case without 4 low. I just assumed since basically every GM truck I've had that was a 4x4 has had 4lo that this one did too. Plus I didn't care about Z71 package because I was going to upgrade the suspension anyway. Now I was thinking, since it seems like everything is identical in both 4x4 trucks other than the transfer case, couldn't one just be swapped in? I found a post on a Tahoe forum where someone with a 2012 Tahoe that had a single speed swapped to a dual speed and everything was identical other than the transfer case and the TCU