I have the same extender(purchased used and they said it was the right one but I disagree)with same number#1U5A-19G299-AA for my 2002 but it is too wide and forcing really hard and with a lot of effort, to fit on rotator pin works but it slips off when lifting up to rotate inward into bed. The push pins on the extender don't want to line up that well either. I pull it in and out manually but it is not hooked on properly doing it that way either. My co-worker's 2003 is reversed with holdster clips on the sides of the bed and the rotator pins are fixed on the extender. His is by Amp research Westin name. I may customize mine by cutting out the material on the rotator housing on the extender away and just using the pins at the top to hold in place, not sure yet. May add pics if I get feeling like it for this post too, later. Need to figure how to get tonneau cover unlatched by cab as it is stuck locked and rear by tailgate opens but does not move cable via key lock. what a design!