Drivers Door closing/latching issues
Problem, I still notice the door does not close tightly as my passenger door does. Is there anyway to adjust this? Do I need a new door latch mechanism on the door itself?
One possibility could be that the post just needs to be adjusted tighter. You can loosen the post up and it can be slid up/down and left/right to adjust how the door latches. Getting that just right can take some time.
The second possibility is that the hinge pins may be badly worn and are allowing the door to sag at the hinge, which can create more space than normal on the leading edge (hinge side) of the door. If the door isn't sealing in the front, I would be willing to wager that this is part of the issue, especially since this is the driver side door and it sees a lot more use than the passenger side. If the door seems to be tight in the front, you can't see light through the seals when it is closed and it still rattles, I think it's likely that the latch pin adjustment is still your issue.
The third possibility is that it may be the door seals themselves that are failing you. If the door rattles, this isn't generally the issue, but if wind/road noise is what you're experiencing then the door seals may be getting old and tired. Your options there are to either replace the seals with new ones or to do the "door seal mod" which involves removing them and installing a piece of rubber surgical tubing or caulking backer rod inside the old seal to reinforce it.
One last thought, and I just dealt with this on my truck, is that it's possible that the rattle you're hearing is not the door so much as it is the inside door panel. In my case the cause is twofold. One issue is that the 3 plastic pins (some people call them pine tree pins) along the latch side of the panel were completely shot and they weren't holding the panel in place. Every time I would hit a bump in the road that panel would flap around and rattle. These pins can be bought at just about any parts store and they're a cheap and relatively easy fix. I think I paid $5 for a box of 15 of them at Autozone and while they were a little tough to get to snap into the holder on the inside of the panel, they really grabbed tight when I popped the panel back onto the door. My other issue is with the panel itself. Along the top edge of the panel there is a lip about 3/4" wide that is supposed to hang over the inside of the window opening so the panel kind of just hangs there on that lip. On my panel the inside window seal is broken loose from the plastic door panel and that lip is all busted to pieces. That being the case, the corner of the door panel (up by the lock pin) doesn't really hold tight to the door anymore. This seems to be a pretty common issue with these door panels as well. The plastic gets old and brittle and it breaks easily (this happens to the owners of these trucks too!) and it lets that corner rattle. In the past, I have just ran a screw through that corner of the panel and into the steel, but on this truck I may actually try to repair the panel itself since it is badly broken that the inside window seal doesn't stay in place.
I hope that help. Sorry it's kind of a novel...

Edit: It looks like Brian has clued you in to the most likely cause of your issue while I was composing my novel.
jrc






