The passenger side brake light is out

l am gunna guess it like 99% of the cars out there and you open the trunk disconned the light mount from the tail light and then remove the bulb.

You normally have to remove some plastic in the trunk to get at it.

Pop the truck, take off the carpet off the backwall. More than likly will have these big pop in screws, or something you can twist. And than once that is off, pull the carpet away from the back of the car, and you will see the light. Than you will see the wires going into the tail light, twist the plastic part, until it wo not twist no more. Either left or right, and than pull it out, and replace the bulb.

well the before me were kind of right. remove the cover in the hatch area behind the light. there is 3-4 11mm nuts that hold the light assembly in place remove those and replace the bulb.