Re: New Guy with a question...
Most likely, the towing package includes a transmission cooler. If you are only going to tow 2500# or less, then an aftermarket hitch is fine, otherwise, just install a tranny cooler, and you should be good to go. The dealer should be able to let you know if the towing package includes anything else.
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