Is their a newer style rear bumper that is a direct fit on a 2002 Yukon XL?

[S33k3r]

So, is this another way of saying,
I can't SIMPLY install a GMTK2 rear bumper on my GMT800, without also changing my hitch?

Is the GMTK2 hitch superior to the GMT800 hitch?

You cannot use the GMT800 hitch with a GMT900+ bumper. The hitch will potentially break in half. This is because there are two bolts that go through the GMT800 hitch to the bumper for support. The GMT900+ bumper does not have these supports.