Started to use my wife's 2016 Tahoe to pull my boat. Never used before, has factory towing package. Plugged into the wiring harness and no
lights. Friend said I had to take it to dealership to get "hooked up". He thought it was a relay or fuse or something they needed to install. Anybody
know what this is, and can I get it at the parts store and do it myself?
TIA