Another option seems to be a
Step bumper hitch which just bolts on the the U shape behind the spare tire. scroll down to the 3rd item (Acme Universal Hitch.) Won't block the light harness and looks like it comes with spares to drop the hit h down enough to allow the bumper cover to remain in place. I am going to give it a try and will post my thoughts after install on 2006 GX.
Found the same hitch on Amazon for $29.98 with shipping. Ordered it. I will let you all know how it goes.
Acme Universal Class III Hitch
