I bought a el camino door from part a part not to long ago and put it on my car. It was working fine till one day I went to open the door and it wouldnt open nor bulge I never got a chance to put the door panels on before it started acting up so i have pulled the handle and rod numerous times. To me it seems like the door latch in not disengaging or releasing so I can open the door. Any ideas to open me with this issue and open the door. Its a 82 El camino