Manual door lock problems...

[Russ72C10]

I've only had my '84 K20 for about a week now, but there's a nasty little problem that's surfaced. I found out the hard way. Apparently when the door is locked, if the door handle button is pushed BEFORE unlocking the door... something gets caught and makes it darn near impossible to get back in the truck. Fortunately my GF is small enough to slide through the back window, roll down the side window for me so I could beat on the inner door handle, pull the knob up, etc. It finally unlocked. The passenger door will NOT unlock (from inside or outside). It's been jammed for a couple dayts now and I'm having no luck at all with it. So I'm thinking it's time to tear into the door panel because I can definitely see myself getting stranded somewhere due to this.

Question is... has anyone here had such luck with manual locks jamming? And it's only when the button is depressed before unlocking it with the key. I sure could use some insight on this one.

Thanks in advance!

(PS - Otherwise I love this truck more and more each day!)