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Old 10-11-2010, 01:49 PM   #1
jeff_in_oregon
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Door Lock Parts

My son and I just bought a '72 Chevy 1/2 ton, 2wd for a project. And it's definitely a project. One of the first things we want to address is the driver's side door.

We took the door apart to see why it won't lock, and we found that there are a couple of things missing. but I'm not sure exactly what. The cylinder is there, but it just rotates. There is nothing for it to touch. There's something on the latch mechanism that looks like it's supposed to be engaged by the lock. But there's nothing in between the latch mechanism and the cylinder. Also, there's nothing connected to the inside door lock knob. You can just pull it straight out.

What parts do we need to fix this, and where's a good place to get them?

Thanks!
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Old 10-11-2010, 03:02 PM   #2
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Re: Door Lock Parts

I would buy good used parts from one of the guys on this site as the repop door lock parts are not as strong as the old ones. I used new parts on mine and they didnt last very long. Look in the catalogs to figure out what you need and then go to the used parts guys here and someone will have the parts you need.
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Old 10-11-2010, 04:18 PM   #3
gary2232
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Re: Door Lock Parts

I would order a parts catalog from LMC or Brothers. They are a good source of info as to what parts you need and assembly of things. They are free and even if you don't get your parts there they are good to have.

http://www.brotherstrucks.com/
http://www.lmctruck.com/
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Old 10-11-2010, 04:44 PM   #4
jeff_in_oregon
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Re: Door Lock Parts

Thanks for the advice, guys. I have a couple catalogs on the way!
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Old 10-11-2010, 07:03 PM   #5
big mike71
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Re: Door Lock Parts

Feel around inside the bottom of the door the parts might be down there.
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Old 10-11-2010, 07:24 PM   #6
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Re: Door Lock Parts

If you haven't already done so, check carefully in the bottom of the door for some missing parts. When clips break, the linkage pieces often end up in the bottom of the door.
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Old 10-11-2010, 08:39 PM   #7
LockDoc
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Re: Door Lock Parts

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Here is a picture of how the lock pawl sets in the door latch... It moves the large "C" shaped piece up and down.

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Last edited by LockDoc; 10-11-2010 at 08:40 PM.
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Old 10-11-2010, 08:45 PM   #8
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Re: Door Lock Parts

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Oh, and here is what the back of the lock looks like, and a side view.

LockDoc
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Last edited by LockDoc; 10-11-2010 at 08:48 PM.
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Old 10-11-2010, 10:08 PM   #9
jeff_in_oregon
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Re: Door Lock Parts

Great pictures, Leon, thanks a lot!
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Old 10-11-2010, 10:53 PM   #10
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Re: Door Lock Parts

Quote:
Originally Posted by jeff_in_oregon View Post
Great pictures, Leon, thanks a lot!
No problem. Oh, and to the board...

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Old 10-12-2010, 07:18 AM   #11
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Re: Door Lock Parts

Quote:
Originally Posted by LockDoc View Post
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Oh, and here is what the back of the lock looks like, and a side view.

LockDoc
FWIW, I had the locks and parts in my truck when I bought it but no key. At the same time I had a 71 Monte Carlo that was headed for the bone yard which I had all the keys for.

If you look at the first picture in post #8, all you need is the triangular metal pawl and any door cylinder from this vintage. Pop the clip off of the spare lock, place on the pawl, and then replace the clip.

As others have posted you have a pretty good chance of finding the pawl in the bottom of the door. If not, click over to the parts board and get a used set from one of the many dismantlers who lurk there.
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Old 10-12-2010, 08:23 AM   #12
LockDoc
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Re: Door Lock Parts

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Pretty much, any GM door lock cylinder from 1967-1987 and even later trucks will work by changing the pawl. As long as they are the same style lock. There are three different length lock cases for the cars so you have to watch that, but other than that any of them will work...

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Old 10-12-2010, 10:07 AM   #13
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Re: Door Lock Parts

LMC catalog is a great reference tool but I find their parts sometimes very "cheap". Also, when you call to order and have questions they are clueless. I prefer to use REZ Engineering as he is an avid enthusist and his parts are quality and pricing is right in there with LMC. Call Don at 406-727-9267 for a catalog.
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