I added a Curt hitch, myself. Took about 20 minutes alone, including getting the car on the ramps in back, lol. My van didn't have cruise control, base XL, so I added factory cruise control for about $125 for the steering wheel and 5 minutes of my time on the laptop enabling CC feature. No aftermarket kits or wire splicing required.
My 2015 XL van with AM/FM/Aux base stereo has (obviously) an Aux port, down in the center console below my elbow. I "bought" a free Sirius XM radio kit during a Christmas sale in 2015, plugged it in & been good ever since. No extra parts or real work needed since the radio sits in the cupholder, aside from running the antenna wire up the B-pillar and onto the roof.