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#1 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Hey LockDoc...
Three questions for you that might be of broad enough interest that I'll post as a thread rather than bugging you in a message.
First, why are GM locks so hard to pick? My locksmith friend (20 years ago) said they had a "slider" that prevented it. But then why wouldn't all locks have that? Second, any idea how many pins and how many depth options there are? Like if there are 5 pins of 6 possible depths that's about 15000 possible different keys. Lastly, my Dad had a 1961 GM key (the older style head) and he said that just by the luck of the pin depth setup on that key it had about a 25% chance of opening other cars if you jiggled it. I don't think he was talking about a bump-key style approach but do you have any idea what he might have been talking about? Thanks!
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#2 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,490
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Re: Hey LockDoc...
Quote:
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#3 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Hey LockDoc...
Thanks! I was wondering if there was a transition limit (like going from a 1 to 5). Not hard for the computer of the day to pick, I suppose, about 10 lines of code.
Any idea why all locks aren't sidebar? Seems like an important security feature, and if its from 1935, the patents are long since expired...
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#4 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,490
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Re: Hey LockDoc...
Quote:
I don't know how long patents last but Ford went to the double sided key in '65. I think Chrysler used a few sidebar locks in some of their higher end cars. Most of the problem was that the sidebar would only work with wafer tumbler locks and everyone except GM used pin tumbler locks.... The Ford locks were made by the Hurd Lock Co. and the Chrysler locks were made by the Yale Lock Co.. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#5 |
Registered User
Join Date: May 2013
Location: Henderson, NV
Posts: 120
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Re: Hey LockDoc...
good info, I've encountered some of those worn lock cylinders that would allow any GM key to turn a door or ignition lock.
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1968 Chevy C-10 Suburban - 350/350 1969 Chevy C-10 Panel Delivery - 454/400 1972 GMC K1500 Jimmy - 350/350/np205 1978 Chevy Corvette Silver 25th Anniversary reddit.com/r/chevyc10 <-Join it! |
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#6 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: Hey LockDoc...
I actually had a key that would start a B I L's car back years ago. Then one day it suddenly wouldn't. He claimed he hadn't done anything to the ignition but lube it. Maybe that released one of the wafers that was stuck.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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#7 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,490
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Re: Hey LockDoc...
Quote:
I'm betting that's what happened. I have taken a lot of them apart that had tumblers stuck in them. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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