Hi Dorlow, I just read what I've gone through for the last year with my Saturn Relay power sliding door in your posts. Unfortunately I have no answers at this point in time.
Mine will stay closed at times no matter what I do, when it decides to open it will do so while I'm driving or will just work normally one day.
Sometimes it will not stay closed, and I am stranded; unable to leave my van! I've noticed that when it opens it does not open as far as the other good working the door (the passenger side, rightside). Also the cable does appear looser on the dysfunctional side compared to the working side.
I've taken it in but it works fine everytime the service shop has it.
Keep me updated please. I plan on purchasing a Hanes Manual soon.