Door Lock Cylinder Replacement - 66 C10 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

scoot_mcgrute · 01-24-2017, 11:08 AM

Hey guys, I just installed a pair of door lock cylinders from LMC and thought I'd make a post showing the steps I did to make them work in the original handles. I knew something was wrong when I did the first one and couldn't get the key to work. Some searching found that others had to modify them to get them to work right but no pictures or anything.

I held the new one and the old one up side by side and noticed that the flats were a lot longer on the new units.

I marked the new one at the same length of the original

I cut the flats with my cutoff wheel but you can use anything that will cut metal. Don't forget your PPE

Reassembly started, put the spring cup with the round hole on first and then drop the cylinder in the handle. The lock cylinder will only go in at the correct orientation of the key, horizontal, so don't worry about installing it wrong.

Next is the spring, I used my vise to hold the handle so I can compress the spring

Next is the other spring cup and the retaining ring, it only goes on in the correct orientation. You will need to compress the spring, I did it by pushing on the top spring cup and then using the snap ring to push it in the rest of the way. Make sure the snap ring sits in the groove and you're done!

Reinstall on the truck and bask in your new door locks. Mine didn't have the lock on the passenger side which made it a pain on dates

Hopefully somebody finds this useful

Heater63 · 01-26-2017, 11:58 PM

Thanks!, good info.

**MusicMan70** · 01-27-2017, 01:08 AM

Thanks as well for this ScoMac!

343CA · 01-27-2017, 11:41 AM

Great info and pictures,

elane352 · 07-09-2020, 09:29 AM

ScoMac,

Thank you for posting this. I had the same issue with LMC door lock cylinders and the original door handles on my 64. I followed your steps. I am good to go now.

Edward

dream66 · 11-03-2020, 06:12 PM

I'm 3 years late to the lock party but this thread shore did help me out.

88Stanger · 11-03-2020, 07:02 PM

Thank you for posting!

Lokin4AReason · 11-04-2020, 01:04 AM

Nice homework on the aftermarket component(s) . . .

I was wo dering the at when i was flipping page(s) on the catalog . Two cut(s) make it all happen . . .

01-24-2017, 11:08 AM	#1
scoot_mcgrute Registered User Join Date: Apr 2004 Location: Tigard, Or Posts: 503	Door Lock Cylinder Replacement - 66 C10 Hey guys, I just installed a pair of door lock cylinders from LMC and thought I'd make a post showing the steps I did to make them work in the original handles. I knew something was wrong when I did the first one and couldn't get the key to work. Some searching found that others had to modify them to get them to work right but no pictures or anything. I held the new one and the old one up side by side and noticed that the flats were a lot longer on the new units. I marked the new one at the same length of the original I cut the flats with my cutoff wheel but you can use anything that will cut metal. Don't forget your PPE Reassembly started, put the spring cup with the round hole on first and then drop the cylinder in the handle. The lock cylinder will only go in at the correct orientation of the key, horizontal, so don't worry about installing it wrong. Next is the spring, I used my vise to hold the handle so I can compress the spring Next is the other spring cup and the retaining ring, it only goes on in the correct orientation. You will need to compress the spring, I did it by pushing on the top spring cup and then using the snap ring to push it in the rest of the way. Make sure the snap ring sits in the groove and you're done! Reinstall on the truck and bask in your new door locks. Mine didn't have the lock on the passenger side which made it a pain on dates Hopefully somebody finds this useful __________________ 1966 Army Truck http://67-72chevytrucks.com/vboard/s...d.php?t=691778

01-26-2017, 11:58 PM	#2
Heater63 Registered User Join Date: Dec 2007 Location: N Texas Posts: 580	Re: Door Lock Cylinder Replacement - 66 C10 Thanks!, good info. __________________ 292 + TKO500

01-27-2017, 01:08 AM	#3
MusicMan70 Senior Member Join Date: Feb 2011 Location: Corona, CA Posts: 1,842	Re: Door Lock Cylinder Replacement - 66 C10 Thanks as well for this ScoMac! __________________ MusicMan70 1961 GMC Suburban

01-27-2017, 11:41 AM	#4
343CA Registered User Join Date: Sep 2013 Location: Imperial,Ca. Posts: 15	Re: Door Lock Cylinder Replacement - 66 C10 Great info and pictures,

07-09-2020, 09:29 AM	#5
elane352 Registered User Join Date: Jul 2014 Location: Bowie, Maryland Posts: 82	Re: Door Lock Cylinder Replacement - 66 C10 ScoMac, Thank you for posting this. I had the same issue with LMC door lock cylinders and the original door handles on my 64. I followed your steps. I am good to go now. Edward

11-03-2020, 06:12 PM	#6
dream66 Registered User Join Date: Feb 2020 Location: Austin, TX Posts: 77	Re: Door Lock Cylinder Replacement - 66 C10 I'm 3 years late to the lock party but this thread shore did help me out.

11-03-2020, 07:02 PM	#7
88Stanger Registered User Join Date: Mar 2015 Location: Washington State Posts: 1,654	Re: Door Lock Cylinder Replacement - 66 C10 Thank you for posting!

11-04-2020, 01:04 AM	#8
Lokin4AReason Registered User Join Date: Oct 2014 Location: somewhere . . . Posts: 974	Re: Door Lock Cylinder Replacement - 66 C10 Nice homework on the aftermarket component(s) . . . I was wo dering the at when i was flipping page(s) on the catalog . Two cut(s) make it all happen . . . __________________ dont want to hear excuses, i want to hear solution(s)



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