No Problem with 2009
I just installed a Draw-Tite Class III receiver hitch (75659) using the
T-One 4 pole wiring harness (118465) from Etrailer.com. Very straight forward, no drilling or enlarging of holes required. Just a slight depression of the flexible covering on the bumper, not really noticable. Used my wheeled jack to support hitch while fastened the bolts (or need to use wire to pull bolts through holes). Good idea to use a torque wrench when tightening the bolts.
I did not like the idea of pulling trailer connection wire out of spare tire well and over tailgate each time, so I pulled one of the rubber groument/plugs out of the outer tire well, cut the trailer wire, snaked it through that hole and one just below the tailgate hinge, then soldered and used heat shrink tubing on each of the wires. When I snugged up the wire, I cut a silt in the groument for the wire and pushed it back in the hole to seal the tire well. I have attached a few pictures of the process.