05-10-2006, 10:01 PM | #1 |
Registered User
Join Date: Apr 2006
Location: Grants Pass, Ore
Posts: 22
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Door lock
Newly acquired restored 72 swb. Drivers door key only works when door is open. When door is shut you can not push button down or use key. Locksmith checked out cyclinder and said all is ok w/ that part. Any suggestions?????
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05-10-2006, 10:10 PM | #2 |
Red Headed Step Child
Join Date: Oct 2003
Location: Atlanta, GA
Posts: 1,216
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Re: Door lock
I got 2 of these trucks and my dads got 1. None of the locks work for some reason for us so long story short.. I'm subscribing to this thread
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"Dinner, the perfect break between work and drunk" -Homer Simpson |
05-10-2006, 11:02 PM | #3 |
Registered User
Join Date: Apr 2006
Location: Grants Pass, Ore
Posts: 22
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Re: Door lock
Well, maybe someone out there has some useful info......
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05-10-2006, 11:12 PM | #4 |
Just A Tool Hand
Join Date: Jan 2006
Location: Lovington,New Mexico
Posts: 70
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Re: Door lock
my 69' the same problem
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05-10-2006, 11:15 PM | #5 |
Registered User
Join Date: Jan 2004
Location: LV,NV
Posts: 169
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Re: Door lock
i just changed a door latch on my 70..the mechanism is very simple..if you pull off the door panel and roll up the window you can see what's going on..if i remember correctly, the lock cylinder just rotates and contacts a lever on the door latch to lock/unlock..a rod connects the interior knob to the latch for lock/unlock...and another rod attaches the interior handle to open the door..look inside, i remember it wasn't too complicated...
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05-10-2006, 11:20 PM | #6 |
Registered User
Join Date: Jan 2006
Location: Houston
Posts: 434
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Re: Door lock
This may have something to do with door alignment and the way the door latch sits on the door jamb striker. While the door is closed and the key in the lock, try pushing your door to make it close tighter and turning the key at the same time. See if you get movement. Also, reverse procedure and pull door handle and turn key at the same time. Does key and lock move?
Don't know how to fix this. I'm on my second truck and one door on both had the same issue. On the first truck I did everything to try and fix and never could. On the second truck I live with it and push on door and turn key at same time and it locks everytime. Just not going to bother unless someone has a good suggestion. |
05-10-2006, 11:38 PM | #7 |
Senior Member
Join Date: Jul 2004
Location: Estherville, Iowa
Posts: 3,371
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Re: Door lock
I'm pretty sure that the latch mechanism in the door gets worn enough that the lock arm tab hits the top of the notch instead of going into it. Sometimes the pin gets loose in the latch roller. A good used replacement, or an aftermarket should fix it.
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1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 |
05-10-2006, 11:56 PM | #8 |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: Door lock
Green Machine is right. I fix them by welding a washer on the pin then welding the washer to the housing. Then weld up the worn places on the arm tabs and grind back to spec's. If I still have one I will takes some photos .
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
05-11-2006, 12:57 AM | #9 |
Registered User
Join Date: Apr 2006
Location: Grants Pass, Ore
Posts: 22
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Re: Door lock
Thanks, a photo will help.....
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05-11-2006, 07:58 AM | #10 |
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Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: Door lock
Sort of related...
When I got my truck I got a key that worked the ignition. Nothing for the locks. About that time I was junking a 1971 Monte Carlo (after stripping it for my Chevelles). I kept the door lock key cylinders. One day I finally got around to swapping them into the truck thinking GM probably used the same part on both vehicles as there were only 1 year apart in manufacture. They were NOT identical. However upon closer inspection I discovered the little tab on the back of the lock cylinder is removable and custom to the vehicle. After swapping them for the tabs on the truck locks that I did not have a key for I had a functioning pair of door locks. I do know it is impossible to lock your keys in the truck. If you open the door, push the inside lock button down, and slam the door, the lock button pops up. This is a nice feature in that I've never locked a set in the truck. Of course, like others have mentioned, the door has to be aligned for it all to work right. Oh yeah, one more thing. When I got the truck I had to replace the rotating deal at the back of the door that makes contact with the post sticking out of the b-pillar. The door wouldn't stay shut. I bought a used one at a swap meet.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
05-11-2006, 09:46 AM | #11 |
Registered User
Join Date: May 2006
Location: Winnipeg Canada
Posts: 88
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Re: Door lock
My 72 did it too, but I never did look into it. It would work if I pushed on the door while locking it. Unlocking always worked good. As mentioned by others some adjustment is required.
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1967 GMC 1/2 ton 1972 GMC Sierra 1975 Chev 5/4 ton 1978 1/2 Harley FLH 1998 K1500 diesel |
05-11-2006, 06:47 PM | #12 | |
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Join Date: Apr 2006
Location: Grants Pass, Ore
Posts: 22
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Re: Door lock
Quote:
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05-11-2006, 06:52 PM | #13 |
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Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: Door lock
Also, the striker (the part that bolts to the back of the cab, not the door) is adjustable in and out. Loosen the bolts and move it a bit, tighten it and try it. Trial by error worked for me. This solves the "I need to push in the door to lock it" problem.
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
05-12-2006, 01:54 AM | #14 |
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Join Date: May 2006
Location: Weatherford, Tx
Posts: 23
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Re: Door lock
Just got my truck about 2 weeks ago and have the same lock problem. Also I went to get in the truck to fix some wiring and the door handle button broke . So, I took the door panel off to fix and and did and now it doesnt close all the way unless you close it and give a good shove... ? any suggestions?
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1970 3/4 ton 4x4 Lwb - 396ci. w/disc brakes up front (work in progress) |
05-12-2006, 02:38 AM | #15 |
Registered User
Join Date: Nov 2004
Location: "Under Montana skies."
Posts: 1,836
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Re: Door lock
Keeping a little grease on the striker's contact points helps. Watching the movement of the entire mechanism with the door panel off and good lighting can lead one to the likely slop location.
Also, sight the door's striker pin level as you close the door to see if the striker is being hit at the level that the pin with sit in the trough without binding (abnormally).
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'71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup. |
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