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Its a very touchy process at first, but once you have the cover off it goes by pretty smooth and fast.
1) You need a skrew driver, gently pry the tailgate cover loose[DO NOT PULL IT OFF YET]. If you pull the cover off you most likely will break the clips that secure the cover to your tailgate.
2) Once you have loosen the cover, with both hands gently push the cover up and back to release the clips and free the cover[might take a few gentle tries]. You should now be able to access the pulley. It's usually the left side plastic coupler that breaks.
3) Pull the pulley and your tailgate slowly, this will release your tailgate.
4) With tailgate down partially unscrew/untighten bolts[I believe it's 3 bolts, if I remember correctly]. This tailgate handle will be loose, you will be able to better access the pulley and the broken plastic coupler. (Coupler cost $5-9.00, kind of expensive for such a little piece of plastic, but if your inventive you could Jerry-Rig something. I don't recommend duct tape).
5) Replace broken plastic coupler and reattach pulley.[MAKE SURE REATTACHMENT IS CORRECT].
6) Reset handle and retighten bolts. Lift tailgate and check to see if tailgate releases correctly. Once you have verified this, secure tailgate in the upright position.
7) [GENTLY] Reattach cover by sliding up then pressing down firmly but gently until you hear it snap into position.
8) CONGRATS!!! You have successfully repaired your tailgate. On to the next!
9) If still having problems please refer to YouTube for visual reference.