97 K1500 Brake Lights and Turn signals

SO my brake lights don't work but my tail lights do, also the reverse lights and the turn signals don't work. After replacing all the bulbs, I am curious to know what the common link is with all of these.

I had the same problem with the drivers side brake lights, couldn't figure it out until I frogged the units ( swapped them ) and found that the problem was with the light assembly.

i had to replace the circuit boards in my tailights. check the harness with your test light. the defect is not visually obvious.