I agree with JV...There's no tail light or brake light bulbs in the tailgate...the only light bulbs in there is the reverse light (unless you have the rear foglight as mentioned). In any case, to "pop off" the tailgate plastic panel, just use a flathead screwdriver to pry off the NONE moving half of the plastic panel. As indicated in the User's manual, there are 4 clips spaced evenly behind the panel that just "pop off"...but be careful as not to break them.