No!!!
MUCH simpler fix!!!
Maybe this will help others.
I went outside an hour ago, and examined the stuck passneger door and compared to the mechanism on the driver door. I figured out what happened and how to fix it without taking the door panel and latches apart.
There is a part whose name I don't know, on each door, on the rear edge, visible only when the door is open, that physically rotates as the door is closed. This part is forced to rotate by a FIXED plated part on the frame of the cab opening, and as it rotates, its inside end rotates UP behind the door frame latch parts, to secure the door closed.
When you press the exterior door handle button to open the door, you rotate this rotating part back to where that inner edge of it drops BELOW the fixed part on the door frame, and allows the door to be pulled open.
This roating part was jammed in a "halfway" position. It was not rotated sufficiently upward on its inner end to latch the door securely (the door "rattled" but would not open or close tighter). It was however sufficiently partially rotated to prevent the door from being pulled open!
I could see this by pushing against the door from the interior, to open a slight gap bewteen the door and door frame, and lighting the area with a flashlight.
I CAREFULLY inserted a flatblade screwdriver into that gap, from inside the cab, positioned the blade end on top of that inner roating edge, and rapped the end of the screwdriver with my hand only (NOT a hammer!!!). That popped the part downward and the door opened.
I grabbed the door to ensure that it did not try to close itself (slight side slope in my drive), and braced it open. I then lubricated the heck out of the roating part and all the surfaces it comes in contact with, using WD40 spray. I then WORKED the part, woth the door open, by MANUALLY moving it by hand into the "closed" position, and using the door handle button to "open" it each time. I repated several times to ensure penetration of the WD40.
Seems to have worked like a charm. The door opens and closes just fine.
Morals of the story: 53 year old door parts need lubrication that prior owners may or may not have provided. And, sometimes we should look first at the EASY solutions. We might get lucky, like I did this time.
