open tailgate
on the side trim you will see a small circle coverd by a cap (about 6" up from floor and about 1" in from boot seal)
remove this cap
then behind the cap theres a 10mm bolt
to get to the bolt you will need a socket and extension
remove this bolt, be carefull not to drop it
pull light rear wards, it may be a bit tight as theres 2 ball sockets that hold the light in aswell.