Problem solved again. A day after I reprogrammed auto lock back to factory settings the door locked again when I shut it. I was getting ready to remove the panel again when I kept looking at the manual slide lock. I can barely see the red marking showing the door is unlocked so I pulled it out of the panel. There is a rod going from the lock to the manual slide. It was at a slight upward angle so I took some needle nose and bent straight.

Now when door is unlocked the red on the slide is showing and door does not lock on it's own. Turned the auto lock off and all's well with the world.

 

Yes. After I inspected the lock and reinstalled the panel I disconnected the battery and left it till the next day. Reconnected and drove to town and back. Still locked when I shut the door. That's when I decided to reprogram the lock to factory settings and that solved the problem.

 

I wanted to ask, have you reset the system (battery disconnect) recently? replaced the vehicle battery? Sometimes doing so will clear any settings and you'll have to re program what you want.
But it sounds as though you got it squared away.

 

Ok,problem solved,sort of. Took panel off and inspected the entire lock assembly. All looks good. No loose or bare wires. Lubed all moving parts well. Put back together and still locks when door is closed hard. So I decided to reprogram the locks to factory setting. Locks automatically when start to drive and will unlock when I remove the key. Got out and closed door hard. Does NOT lock now. Did this several times and never locked on it'sown.Pressed lock on remote and locks.Pressed unlock and unlocks. Opened and closed several more times and it never locked.

Guess I'll just have to live with the auto lock. Just annoying I have to remove the key to unlock but won't have to worry about locking the keys in it again. Thanks for all the advice. I'm sure I'll be back with more problems as she gets older ( almost 20 now )

 

Yep, that's what I thought might be the issue. A short in the wiring in the door, a connection or the actuator.

 

Maybe a shorted or pinched wire in the door jamb area?

 

If I close it gently it does not lock but if I close it like normal it locks. Passenger door does not lock so I know it's in the drivers door only. Going to pull the panel off next week and check lock actuator connections.

 

I would think it has more to do with faulty door lock switch just activating when the door is slammed.

 

Sounds like it could be a problem with the body control module or a programming problem. Would need the FSM to determine what can be done.
Could always go the your local chevy dealer and ask. Hopefully they have an experienced Tech that can tell you what needs to be done from experience. Without charging for the info.
Then, at least you'll have a clue as to what to do next.
Good Luck with it and please report back with what you find out.
Thanks

 

Try shutting the door VEEERRRRYYYY soft and see if the doors lock. There could be a loose connection or short that is triggering the lock actuator when you jar the wires by shutting the door.

 

Yes. When I bought the truck the doors locked at 10 mph but would not unlock till the key was removed. I disabled this a long time ago. My problem is with motor off, when I close the drivers door it locks. just started doing this today.

 

My 2001 has the programmable door locks with options. It's covered in the owner's manual.

 

Weren't there setting for door lock preferences even back then? I vaguely recall my 02 having them. If you have the owners manual I would check there. Also might make sur the range sensor is working properly. If the computer thinks it is in drive it will lock the doors.