Usually the factory tow packages - any make/model - just add the tranny cooler as Terry said. Sometimes levelling shocks, sometimes the wiring and harness, sometimes a hitch. But the major mechanicals in the drivetrain aren't different. Even many rear-drive vehicles don't get different rear differential gearing anymore, now that many vehicles have a 6-gear tranny.
Add the tranny cooler, add the wiring, add the break controller and the hitch, and you are good. If you get too much rear suspention sag, add a weight distribution hitch. I recommend the Prodigy line of break controllers and the Equalizer or Equalizer E2 weight distribution hitches.