My buddy has a 01' Z71. Bought a set brand new, rotated every 5K miles and got a total of 22K out of them. Just stating my experience.
In addition, I rubbed up against a tree and cut my side wall with them.
I have nothing against the company, the new KM2 is an awesome tire...
I guess we've had different experiences then. Like I said earlier, I've rotated my tires once in the past 20k, and still have nips on them. I haven't had problems with sidewalls when rubbing up against sharp boulders and such either.
Oh well, to each his own.