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63-66 Door Locks
#1387676 Wed Dec 09 2020 03:07 PM
Joined: Nov 2019
Posts: 86
H
HFfarms Offline OP
'Bolter
Fellow Bolters;

What is your experience with the 63-66 body style door locks? From what I understand, there is the inside lock (push the handle into the down position) and then the external lock (on the door handle button that uses the key). Each one is separate such that if you lock the inside door lock and then close the door, the door is locked for good unless opened again from the inside.

Is there a method to just override the inside door lock so that it cannot be used at all? The driver side latch of my '64 is so worn out that the door locks itself from the inside every time you close it. The handle literally falls into the lock position even when gently released. My passenger side still has the "click" that requires the lever to be pushed down to the lock position, but, if you pull up to open the door, and then release it from its upper position, the return spring slams it back down and all the way into the lock position.

After being locked out of my truck again yesterday I am about fed up with the locks and don't even view them as remotely necessary. Its a 2 ton farm truck, anyone who wants to try to steal it wont even know how to drive it.

Additionally, and maybe not appropriate to answer via public forum, but any tips on getting inside if locked out? Both times I have been lucky and my passenger window was cracked. Had it not been, I have zero clue how I would have gotten in. The roof overlap and solid steel doors mean my typical protocols I use on the newer trucks don't work. I am happy to have any discussion on this via PM for obvious reasons.

Appreciate any insight you may have to the door locks. It could be that mine are simply all messed up.

Re: 63-66 Door Locks
HFfarms #1387680 Wed Dec 09 2020 03:35 PM
Joined: Oct 2015
Posts: 330
P
'Bolter
Other than replacing parts you can leave your vent window unlatched . then you can reach inside and open the door .

John


good planning is no substitute for dumb luck
Re: 63-66 Door Locks
panel fan #1387779 Thu Dec 10 2020 02:45 PM
Joined: Nov 2019
Posts: 86
H
HFfarms Offline OP
'Bolter
Originally Posted by panel fan
Other than replacing parts you can leave your vent window unlatched . then you can reach inside and open the door .

John

The vent window idea had crossed my mind. Without a doubt the driver side parts need replaced, and will be. The idea of the truck being locked from the inside and then unable to be opened except from the inside again is worrisome to me. Murphy's law. When the kids are over at the farm, playing in the barns, and inadvertently lock the doors (hypothetical) then the issue manifests itself again.

My research has shown that the older models only had a single external key lock on the passenger side. You would lock the driver door from the inside, slide out the passenger side, and then lock the door with the key. Passenger side had an inside handle that wouldn't lock. Looks like in '63 they went to both doors having both lock styles. I am simply wondering if there is a way to do away with the inside handle lock and only have the key lock on the exterior.

This is of course assuming that my doors aren't both broken and the key lock should operate the same lock as the handle lock like any modern vehicle.....

Re: 63-66 Door Locks
HFfarms #1387787 Thu Dec 10 2020 03:54 PM
Joined: Sep 2019
Posts: 43
R
'Bolter
Hi,
I have a 63 c10. I know what you mean. It's actually a pretty good theft deterrent.

However, i understand your worry. I have no lock holes on the outside of the passenger door either (only locks from the inside.) The driver door you can shut and lock with a key on the outside.
You can do a couple things:
1. You can always carry your keys and lock the drivers door from the outside and lock the inside of the passenger door (first)
2. You can remove the inner door mechanism where the lock handle is and weld a piece over the hole and leave the latch part on the passenger door for the outside part. This way you can still open/close that door from the outside only.
3. Same thing, but instead of removing it, cut off the part and make sure it's on the "open" position before you cut off the inside handle part.
4.a You can just remove the rod and keep the look of original and this way the outside latch only works and you'll have to open the window to let yourself out from the inside.
4.b Ask "MagGyver" for some insight....

Good luck.

Re: 63-66 Door Locks
HFfarms #1387808 Thu Dec 10 2020 08:09 PM
Joined: Mar 2020
Posts: 209
T
'Bolter
I have a 62' and also have the same door handles. (now wondering if my handles are year appropriate)
I have key holes on both passenger and drivers side. The passengers side is an upside down drivers with the same lock set.
My passenger side door used to lock itself when I slammed the door. I turned the interior handle to be straight up and down with the handle in the down position and that seemed to help.
I always leave one of the wing windows unlatched but closed so if I am locked out I can push it open to unlock the door.


62' GMC Fleetside 3/4 ton 235 4-speed.
Time makes fools of us all.
Re: 63-66 Door Locks
HFfarms #1387874 Fri Dec 11 2020 02:30 PM
Joined: Sep 2019
Posts: 43
R
'Bolter
Also sounds like the mechanism might be potentially worn out or broken. I had replaced mine, but still have the originals, but the spring on one side broke. The inside door handles should remain in place when closing and opening. Sounds like the gears are worn or make sure the screws are tight on the door crank on the inside. Otherwise, the move too much.

Re: 63-66 Door Locks
HFfarms #1390495 Wed Dec 30 2020 09:07 PM
Joined: Apr 2010
Posts: 475
6
'Bolter
I had a '63 C10 and I still have a '62 C10. I have always had the handles oriented in the "downward" direction. Gravity keeps them from locking or unlocking. Push forward locks, pull back unlocks/opens door.
Only suggestion I could make for a temporary fix would be to try that on your truck. Let it be a gravity assist to keep it unlocked. At least until you can rebuild the mechanism with new parts.

Re: 63-66 Door Locks
HFfarms #1390851 Fri Jan 01 2021 11:24 PM
Joined: Nov 2019
Posts: 86
H
HFfarms Offline OP
'Bolter
Thanks all. Ive got new mechanisms on order now, but that only solves the auto locking driver door. My primary worry is the whole accidental locking of the door handle and shutting the door and then not being able to get back in. Seems like a half thought out design

I heeded the advice of others above and leave the vent windows unlocked now. I has avoided the lockout twice. Its always the passengers that ride with me. Lift up the passenger door handle to unlatch the door, release it from the top or accidentally bump it down while climbing out (its a big bolt that sits up high), and then shut the door which is now permanently latched from the inside. It is an annoyance I suppose I can just get used to, but as an engineer it just seems poorly designed.

Ill rip apart the doors again and tinker to see if I can just override/disable the handle lock altogether. There are key locks on both exterior handles if I truly need to ever lock the truck, and that's key operated and pretty idiot proof.

Re: 63-66 Door Locks
HFfarms #1390893 Sat Jan 02 2021 01:27 PM
Joined: Feb 2001
Posts: 1,376
T
'Bolter
Just an observation from a simple mind. Why not put another key under the hood somewhere ( in the air cleaner?) . So if you do get locked out you can always open the hood and get the extra key to open the door.


Tommy
59 apache 1/2t
261 short stepside
Re: 63-66 Door Locks
HFfarms #1390898 Sat Jan 02 2021 01:44 PM
Joined: Nov 2019
Posts: 86
H
HFfarms Offline OP
'Bolter
Originally Posted by Tommy
Just an observation from a simple mind. Why not put another key under the hood somewhere ( in the air cleaner?) . So if you do get locked out you can always open the hood and get the extra key to open the door.

So the problem is that once locked from the inside, you cannot unlock either door from the outside. The outer handle key lock is a separate mechanism from the inner door handle push down lock. When the inner handle is locked, the only way to unlock it is to physically pull up on the handle from the inside. That's the issue at play here.

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