C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Changing door lock cylinders

Thread Tools
 
Search this Thread
 
Old Sep 12, 2025 | 07:17 AM
  #1  
majorbob's Avatar
majorbob
Thread Starter
Instructor
Veteran: Air Force
All Eyes On Me
Loved
Community Favorite
 
Joined: Jun 2025
Posts: 164
Likes: 163
From: NH
Default Changing door lock cylinders

I haven’t done a lot of homework yet, but curious if anyone has changed out their door locks, specifically on a 73 convertible. I just bought one a couple months ago that did not come with door keys (cylinders were changed during restoration 10 years ago so ignition key doesn't work in doors). I have a track record of breaking things when I remove door panels on other vehicles and don't want to do that on a 50 year old car.
Reply
Old Sep 12, 2025 | 09:05 AM
  #2  
Douglas Mariani's Avatar
Douglas Mariani
GM Cert Corvette Tech
15 Year Member
Pro Mechanic
Community Favorite
Top Answer: 1
 
Joined: Apr 2008
Posts: 2,559
Likes: 585
From: Anaheim Hills California
Default

Originally Posted by majorbob
I haven’t done a lot of homework yet, but curious if anyone has changed out their door locks, specifically on a 73 convertible. I just bought one a couple months ago that did not come with door keys (cylinders were changed during restoration 10 years ago so ignition key doesn't work in doors). I have a track record of breaking things when I remove door panels on other vehicles and don't want to do that on a 50 year old car.
First of all the ignition key and the door key are two different keys from the factory. Lock cylinders are easy to replace and there is plenty of information and step by step procedures on the Internet to help you.
Reply
Old Sep 12, 2025 | 09:16 AM
  #3  
majorbob's Avatar
majorbob
Thread Starter
Instructor
Veteran: Air Force
All Eyes On Me
Loved
Community Favorite
 
Joined: Jun 2025
Posts: 164
Likes: 163
From: NH
Default

Originally Posted by Douglas Mariani
First of all the ignition key and the door key are two different keys from the factory. Lock cylinders are easy to replace and there is plenty of information and step by step procedures on the Internet to help you.
Thanks for the feedback. Thought I had read on this forum that up thru 73, the square ignition key also fit the door while the round key was for glove box, spare tire, etc. Regardless I'll do a little video research. In the past I have broken retaining clips or ripped them off back side of the panels
Reply
Old Sep 12, 2025 | 09:23 AM
  #4  
Eliredandblack's Avatar
Eliredandblack
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Feb 2018
Posts: 2,325
Likes: 720
From: Marietta GA
Default

First make sure you have a few SMALL lights that will fit inside the door. The locks are made to fit the drivers and passenger side SPECIFICALLY, it’s easy to install the wrong lock. Personally, I would remove one of the locks ( after taking ten photos) then take it to a REAL Locksmith, they can make a new key in two minutes. I removed the alarm key switch on my 73, and had a locksmith make a key for it, not a hard job.
Reply
Old Sep 12, 2025 | 11:08 AM
  #5  
LT1M21Vette's Avatar
LT1M21Vette
Burning Brakes
Photogenic
Liked
Loved
Community Favorite
 
Joined: Nov 2014
Posts: 947
Likes: 213
From: Foothills of the Adirondacks.
Default

Originally Posted by majorbob
Thought I had read on this forum that up thru 73, the square ignition key also fit the door while the round key was for glove box, spare tire, etc
No glove box either on early C3s...
Reply
Old Sep 12, 2025 | 11:34 AM
  #6  
mark79,80's Avatar
mark79,80
Melting Slicks
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2000
Posts: 2,142
Likes: 195
From: Englewood FL
Default

Quote: “I have a track record of breaking things when I remove door panels on other vehicles and don't want to do that on a 50 year old car.”

Be careful, when removing the lock cylinder. In prepping to paint my 1980, I managed to break the driver’s side window, when removing the lock cylinder. It was held in place by a clip that I pried loose with a large screwdriver. When it broke loose, the screwdriver hit the edge of the window and broke it. If I had to do it again, I would put a towel or some type of padding against the edge of the window to protect it.

Last edited by mark79,80; Sep 12, 2025 at 11:44 AM.
Reply
Old Sep 12, 2025 | 12:23 PM
  #7  
BKarol's Avatar
BKarol
Melting Slicks
Veteran: Army
20 Year Member
Liked
Community Favorite
 
Joined: Sep 2004
Posts: 3,223
Likes: 666
From: Northeast
Default

Here is a 74 which I assume would be similar. Looks like ZIP has the 73 cylinders for @$40.
Here is one video (You can see him prying with a large screwdriver)
Reply
Old Sep 12, 2025 | 12:40 PM
  #8  
majorbob's Avatar
majorbob
Thread Starter
Instructor
Veteran: Air Force
All Eyes On Me
Loved
Community Favorite
 
Joined: Jun 2025
Posts: 164
Likes: 163
From: NH
Default

Thank you all for the valuable information.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-1

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-2

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-3

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-4

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-5

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-6

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-7

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-8

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-9

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
Old Sep 12, 2025 | 04:49 PM
  #9  
VERYSOON's Avatar
VERYSOON
Burning Brakes
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2001
Posts: 923
Likes: 200
From: TX
Default

Majorbob
I accidentally found a fairly easy way to get at that lock retaining clip. If you look at 5:30 in the video you will notice a black panel by his knee. If you remove that panel you can get your arm up in there and grab the clip with some needle nose. Makes installation of the clip easy, too!

VS
Reply
Old Sep 12, 2025 | 05:41 PM
  #10  
majorbob's Avatar
majorbob
Thread Starter
Instructor
Veteran: Air Force
All Eyes On Me
Loved
Community Favorite
 
Joined: Jun 2025
Posts: 164
Likes: 163
From: NH
Default

Originally Posted by LT1M21Vette
No glove box either on early C3s...
Understood. I believe they original author was referring to the center storage container behind the seats.
Reply
Old Sep 12, 2025 | 06:31 PM
  #11  
LT1M21Vette's Avatar
LT1M21Vette
Burning Brakes
Photogenic
Liked
Loved
Community Favorite
 
Joined: Nov 2014
Posts: 947
Likes: 213
From: Foothills of the Adirondacks.
Default

Originally Posted by majorbob
Understood. I believe they original author was referring to the center storage container behind the seats.
Maybe, but that's not a glove box, so don't call it a glove box if it's not a glove box.A glove box is a closed storage in front of the passenger seat. Not that many store gloves in a glovebox nowadays, but we still call it a glovebox. Go figure.
Reply
Old Sep 12, 2025 | 06:45 PM
  #12  
majorbob's Avatar
majorbob
Thread Starter
Instructor
Veteran: Air Force
All Eyes On Me
Loved
Community Favorite
 
Joined: Jun 2025
Posts: 164
Likes: 163
From: NH
Default

Originally Posted by LT1M21Vette
Maybe, but that's not a glove box, so don't call it a glove box if it's not a glove box.A glove box is a closed storage in front of the passenger seat. Not that many store gloves in a glovebox nowadays, but we still call it a glovebox. Go figure.
Tomato, tomahto...
Reply
Old Sep 12, 2025 | 09:14 PM
  #13  
TKX 5-SPEED C3's Avatar
TKX 5-SPEED C3
Drifting
 
Joined: Oct 2024
Posts: 1,656
Likes: 383
From: Toronto, Ontario
Default

Originally Posted by LT1M21Vette
Maybe, but that's not a glove box, so don't call it a glove box if it's not a glove box.A glove box is a closed storage in front of the passenger seat. Not that many store gloves in a glovebox nowadays, but we still call it a glovebox. Go figure.
Easy now...
Reply
Old Sep 13, 2025 | 10:01 AM
  #14  
majorbob's Avatar
majorbob
Thread Starter
Instructor
Veteran: Air Force
All Eyes On Me
Loved
Community Favorite
 
Joined: Jun 2025
Posts: 164
Likes: 163
From: NH
Default

Originally Posted by VERYSOON
Majorbob
I accidentally found a fairly easy way to get at that lock retaining clip. If you look at 5:30 in the video you will notice a black panel by his knee. If you remove that panel you can get your arm up in there and grab the clip with some needle nose. Makes installation of the clip easy, too!

VS
Does it matter if wi dow is up or down?
Reply
Old Sep 13, 2025 | 10:02 AM
  #15  
majorbob's Avatar
majorbob
Thread Starter
Instructor
Veteran: Air Force
All Eyes On Me
Loved
Community Favorite
 
Joined: Jun 2025
Posts: 164
Likes: 163
From: NH
Default

Originally Posted by mark79,80
Quote: “I have a track record of breaking things when I remove door panels on other vehicles and don't want to do that on a 50 year old car.”

Be careful, when removing the lock cylinder. In prepping to paint my 1980, I managed to break the driver’s side window, when removing the lock cylinder. It was held in place by a clip that I pried loose with a large screwdriver. When it broke loose, the screwdriver hit the edge of the window and broke it. If I had to do it again, I would put a towel or some type of padding against the edge of the window to protect it.
Was the window in the up or down position?
Reply
Old Sep 13, 2025 | 11:30 AM
  #16  
mark79,80's Avatar
mark79,80
Melting Slicks
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2000
Posts: 2,142
Likes: 195
From: Englewood FL
Default

It was in the down position. I don’t think you can access the lock cylinder when it is in the up position.
Reply
Old Sep 13, 2025 | 11:46 AM
  #17  
Peterbuilt's Avatar
Peterbuilt
Le Mans Master
15 Year Member
 
Joined: Aug 2006
Posts: 7,425
Likes: 1,558
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Default

If your door locks work OK then just get used to using them.
Vendors sell door and ignition locks that use the same key.
The part with the arrow is left or right only so get the sides correct.


Reply
Old Sep 13, 2025 | 12:25 PM
  #18  
majorbob's Avatar
majorbob
Thread Starter
Instructor
Veteran: Air Force
All Eyes On Me
Loved
Community Favorite
 
Joined: Jun 2025
Posts: 164
Likes: 163
From: NH
Default

Originally Posted by Peterbuilt
If your door locks work OK then just get used to using them.
Vendors sell door and ignition locks that use the same key.
The part with the arrow is left or right only so get the sides correct.

Uunfortunately I can't say if the locks work okay or not, I just don't have a key. Going to try to pull a number of the cylinder without fully re.oving it and have locks.ith cut key to that number/pattern. Don't mind having different keys for ignition and lock, just trying g to mini.ize work and potential of damage.
Reply
Old Sep 13, 2025 | 01:20 PM
  #19  
Rowdy Rat's Avatar
Rowdy Rat
Safety Car
Veteran: Marine Corps
25 Year Member
Liked
Community Favorite
 
Joined: Dec 1999
Posts: 3,599
Likes: 837
From: PA
Default

Originally Posted by majorbob
Uunfortunately I can't say if the locks work okay or not, I just don't have a key. Going to try to pull a number of the cylinder without fully re.oving it and have locksmith cut key to that number/pattern.
.

There is no key code on the door lock cylinder. There IS a key code on the ignition cylinder (but in your case, you don’t really need that)…



Don't mind having different keys for ignition and lock, just trying to minimize work and potential of damage.
Having different keys for the doors and ignition will get to be really annoying after a while. As a previous poster mentioned, just take your door lock cylinders and your ignition key to a REAL locksmith and let them match the key to the locks. Depending upon how busy they are, they can usually have it done the same day.

Regards,

Stan Falenski
Reply

Get notified of new replies

To Changing door lock cylinders





All times are GMT -4. The time now is 05:04 AM.

story-0
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-1
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-2
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-3
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-4
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-5
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-6
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-7
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-8
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-9
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE