To remove the rear brake light

Tool:

Flat screw driver

14mm socket and wrench

use the flat screw driver head to push out the plastic cover (as show in picture), the open the 2 (14mm) bolts

There are 2 more 14 mm bolts hidden in the truck, twist and remove the plastic cover for these bolts as show.

Open the bolts, and you can slide the "whole" brake light back (give you access to the light bulbs)