Which lights aren't working? the turn signal and odometer screen as well as the cameras were not working on my 2018 georgetown. I realized I had shut them off trying to mess with the stereo. I turned everything on using the stereo and it starter working again.
On my 2015 it's on a driver side underneath the dash with a black framework over that pulls off if that doesn't do it the other fuse box is down by the batteries just above the batteries and it takes a screwdriver to get it off