I went to the dealer before work but they were too busy and I ran out of time.
My Jeep does not have a factory tow package.
I will be asking if I can retrofit all the equipment.
Meanwhile, I now know that U-Haul installed a Class III hitch without any hint that the as-installed limit was 2000 pounds. Somebody knew something (I think) because they put in the 4 pin connector, although I did need 4-pin functionality for my 1000 pound bike trailer, I'm not sure I asked for it to be just 4-pins and I'm not sure I didn't.
The Jeep service manual covers hitch installation and removal including the 7 pin connector "if equipped" but I haven't located any reference to an electronic anti-sway control of the type infamous on Wranglers. It needs further inquiry.
A post I found on another (I think) RV forum is from a Liberty owner with tow package and they imply that a hitch sway damper is required in addition to the load leveler/equalizer.
I have a question about brakes: I recall seeing piston-actuated hydraulic brakes on trailers years ago. When the trailer started pushing the ball, the piston applied brakes on the trailer. Are they still used? Something special needs to be done to back up but I thought they were ok when I saw them.
If electric brakes are required, do they have to oscillate along with the ABS brakes on the Jeep? Do (or can) they use an inertial control like the on-dashboard model I saw somewhere?