I have a 2006 Silverado 1500. All three brake lights, rear tail lights, and license plate lights have stopped working. Fuses are good but have no power to them when I checked them with a multimeter.

 

pretty simple. from the fuse there is a wire run (packed with other wires) back to the back - and that needs to have +12V. separately, the lights will likely used -12V ground off the frame. i can't remember it could be 2 wire not 1 wire (both +12V and -12V from fuse box).

you haven't said if there's a "trailer module" around the spare tire. there's plugs under the bumper. you didn't say you checked.

you probably shouldn't post questions unless you checked for power at the easy places yet ?