Dan Grec
Expedition Leader
Check the cradle(plastic U shaped part holding the tire carrier arm to the tailgate) and make sure it is centered when closing the door. Also check that there is proper tension on the tire carrier. If this doesn’t make the noise disappear check the bolts holding the tire carrier to the frame. Mine is squeaky again and needs attention. Hope this helps. Great find.
Silicon spray on the cradle works wonders too.
-Dan