Door lock cylinder code - The 1947 - Present Chevrolet & GMC Truck Message Board Network

65chevysub · 12-23-2019, 05:35 PM

Do the 84-87 Chevy/GMC trucks have a 4 digit code on the door lock cylinder to use for new keys?
Thanks

**hatzie** · 12-24-2019, 04:52 PM

I don't believe so. The 4 digit code still needs to be translated to a cut number sequence in any case.
New locks are not expensive. You get locks that are crisp and clean operating instead of clapped out.

New locks come with cut keys. Ground keys supposedly wear the wafers faster than original cut keys.

Just under $20 for AC Delco D571A door lock pair. It's a pair of cut keys with fresh new door lock cylinders mated to them.
Just under $30 for an AC Delco D1403B ignition cylinder and cut keys. It's a pair of cut keys and a mated ignition cylinder for the 73-87 CK trucks.

You can build up a glovebox lock from a $30 Strattec 593051 glovebox lock kit to match your new door keys.

The lock cylinders assemble in a similar fashion to the door and spare tire locks in my GMT800.

Goats86 · 12-24-2019, 11:10 PM

The code stamped on the door lock housing went away on about the 1973 model.

65chevysub · 12-26-2019, 02:51 PM

Thanks everyone. I'll just replace them.
My ignition switch is new. Came with the truck as it was being started with a screwdriver.

12-23-2019, 05:35 PM	#1
65chevysub Registered User Join Date: Feb 2013 Location: Cottonwood, Arizona Posts: 1,375	Door lock cylinder code Do the 84-87 Chevy/GMC trucks have a 4 digit code on the door lock cylinder to use for new keys? Thanks

12-24-2019, 04:52 PM	#2
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,941	Re: Door lock cylinder code I don't believe so. The 4 digit code still needs to be translated to a cut number sequence in any case. New locks are not expensive. You get locks that are crisp and clean operating instead of clapped out. New locks come with cut keys. Ground keys supposedly wear the wafers faster than original cut keys. Just under $20 for AC Delco D571A door lock pair. It's a pair of cut keys with fresh new door lock cylinders mated to them. Just under $30 for an AC Delco D1403B ignition cylinder and cut keys. It's a pair of cut keys and a mated ignition cylinder for the 73-87 CK trucks. You can build up a glovebox lock from a $30 Strattec 593051 glovebox lock kit to match your new door keys. The lock cylinders assemble in a similar fashion to the door and spare tire locks in my GMT800. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

12-24-2019, 11:10 PM	#3
Goats86 Registered User Join Date: Dec 2010 Location: Waxahachie, Texas Posts: 144	Re: Door lock cylinder code The code stamped on the door lock housing went away on about the 1973 model.

12-26-2019, 02:51 PM	#4
65chevysub Registered User Join Date: Feb 2013 Location: Cottonwood, Arizona Posts: 1,375	Re: Door lock cylinder code Thanks everyone. I'll just replace them. My ignition switch is new. Came with the truck as it was being started with a screwdriver.



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