I have an 18 LT, and I bought an aftermarket hitch, and while it does sit below the bumper, it is not at all unsightly. I din't even notice it. Yes, there was a plug sitting inside the bumper on the driver's side, and it was easy to access, and plug into.
2018 Equinox LT1 1.5 L 4 cyl, AWD, S/R Cajun Red Tintcoat/Black
2010 Equinox LTZ 2.4 L 4 cyl, FWD, S/R Cardinal Red/Black