No tail / parking lights

1992 Suburban K1500, No tail lights/ parking lights / dash lights, also no "buzzer" when headlights left on with ignition off. Brake lights work fine.
Any suggestions? I checked the trailer wiring, and there doesn't appear to be any exposed wires, and it doesn't look like a hack job, however I'm no electrician.

Check the fuses.

I don't remember what year they went to the circuit board style lights, but it is very common for them to fail (open or short). If they shorted, that could be the source of a blown fuse.

Found a thread on it after I had posted. It was the headlight switch.