door lock wont open 72 c10 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MacataQ · 08-17-2023, 12:01 PM

hi all:
hoping someone here can offer some advice.
my passenger side door wont unlock with the key and the plunger(?) wont pull up or go down. inside handle doesnt do anything either. i have removed the inner door panel and PB Blasted everywhere i can reach. all the linkages seem to be connected, i think? i cant get very much leverage on it(cuz im old & fat) and usually working on it by myself.
anyone who has had this issue and got it to work, please let me know.
much appreciated!
Mac

**1970cstblazer** · 08-17-2023, 12:18 PM

See if you can manipulate the lock if you push in on the door to relieve pressure on the pawl. Otherwise it sounds like its rusted causing it to stick. Kroil or P Blaster should eventually release the sticking parts.

MacataQ · 08-17-2023, 01:02 PM

thanks 1970
i tried sliding a wedge under the door below the lock, cuz as i said, im working alone.
forgot to mention,key turn about a 1/4 way in either direction. drivers door goes about 1/2
and it works
Mac

3drburb · 08-17-2023, 01:16 PM

Just for good measure, try pushing the door in from the outside as you turn the key to try and open it.

08-17-2023, 12:01 PM	#1
MacataQ Registered User Join Date: Aug 2018 Location: port colborne Posts: 40	door lock wont open 72 c10 hi all: hoping someone here can offer some advice. my passenger side door wont unlock with the key and the plunger(?) wont pull up or go down. inside handle doesnt do anything either. i have removed the inner door panel and PB Blasted everywhere i can reach. all the linkages seem to be connected, i think? i cant get very much leverage on it(cuz im old & fat) and usually working on it by myself. anyone who has had this issue and got it to work, please let me know. much appreciated! Mac

08-17-2023, 12:18 PM	#2
1970cstblazer All stock and staying that way Join Date: Jul 2003 Location: Elkland, PA Posts: 1,825	Re: door lock wont open 72 c10 See if you can manipulate the lock if you push in on the door to relieve pressure on the pawl. Otherwise it sounds like its rusted causing it to stick. Kroil or P Blaster should eventually release the sticking parts. __________________ 1970 K/5 Blazer CST 4WD, Medium Bronze, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration finally getting close to completion.. 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 45k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 62k miles, 3.6, 8L45, 3.23 LS, 18" wheels

08-17-2023, 01:02 PM	#3
MacataQ Registered User Join Date: Aug 2018 Location: port colborne Posts: 40	Re: door lock wont open 72 c10 thanks 1970 i tried sliding a wedge under the door below the lock, cuz as i said, im working alone. forgot to mention,key turn about a 1/4 way in either direction. drivers door goes about 1/2 and it works Mac

08-17-2023, 01:16 PM	#4
3drburb Registered User Join Date: Jul 2011 Location: Kent, WA. Posts: 852	Re: door lock wont open 72 c10 Just for good measure, try pushing the door in from the outside as you turn the key to try and open it.

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