I bought a used door for my 2000 GMC Yuki. I got a 2003, and there is a part in my door that is not in the 2003. I Have no clue what it is. If you look at the pic, where the courtesy light cable goes over, and it has the two black torque bolts, bottom right, it even has a plug for it. Schematics don’t show what it’s for, and I can’t get it out of the old door, and it’s part of the wiring harness. Any guess’s? Doesn’t seem related to the window track.