Be careful when doing the BU bulbs that are in the liftgate. You need to pry the access panel from the "top" part of the panel and then hinge from the lower part. So use a small flat blade screwdriver when the liftgate is the up position and start at the part of the acces panel that is closest to the glass. Once you get that section loose, pull down and it will hinge towards the floor. Move the white insulation out of the way to expose the back up socket. Change bulb, put the insulation back and forcefully smack the access plate back into position with your palm.
2014 Trailhawk. Bright White exterior. Black Leather interior. V6. All available options (Cold Weather, Comfort / Convience, Sunroof, tow package, hood decal, Nav radio, 9 speaker sound system) , 245/70/17 Firestone Mud Terrains, BVG roof rack, LED fog lamps, LED interior lamps, LED back up bulbs, hood decal pinstripe, rear mounted hitch tire carrier, AFE Cold Air Intake