Side Door Lock Issues.

Help!

My 1968 GMC Handi-Bus (right) side door lock isn't working. The issue isn't with the key lock itself, nor the lever near the window, it's something inside of the mechanism. I took off the interior panel to see if it was rusty, but the mechanism looks as good as new. When the door handle is at the 3 o'clock position (closed), I can't turn the key to get the lock to move nor can I get the lock to engage by pushing down on the lock stem near the window. When I turn the handle upwards to open the door, it is in this position that the locking mechanism functions by turning the key and by pushing down on the lock stem, but it doesn't actually lock the door. Does anyone recommend taking the whole mechanism out of the door to work on it or should I replace it?

Thanks!

I know if it were me, I would try to fix it first. As a last resort I would replace it. I am no expert on these locks but that would be my approach. See what others have to offer.
Kakster

Donivan,

Right on.....the info. about the tab really helps. What should I do? (Does this require replacing the tab or the entire lock assembly and if so where's the best place to get the parts?) Is it easy to remove and install the assembly?

Thanks,
Jason

Another problem I've had with the cargo door locks is the old saggy handle.

This is usually breaks the outside base plate's stop off

or the rib in the handle. But if it has not been abused and is still intact

the play between the square tube that the handle goes in and the plate needs a little welding. A cure that Greg at VCVC.org turned me on to.

I've had mine not turn the plate enough and it was in the way of the locking bar from sliding up into the locking postion. So reach inside the door and see if you can slide the locking bar up with the handle in the closed postion. If not you''l need to take the mechanism out.
Also saggy handles can be from the shafts of the handle being twisted, they should be square with the handle.