GM Lock code on dealer invoice?
 

On the dealer invoice is a number followed by "Key Nos" Is this the code for the cylinder lock?

Re: GM Lock code on dealer invoice?
 

Should be the punch code to have keys made .

Re: GM Lock code on dealer invoice?
 

How many digits should be in the punch code?

Is it typical to find this info on the dealer invoice?

Re: GM Lock code on dealer invoice?
 

One alpha character followed by three digits.

Yes - on the invoice and build sheet. They have to be able to make keys in case the originals are lost or stolen.

K

Re: GM Lock code on dealer invoice?
 

Just before KEY NOS is a 5 digit number. There is no alphanumeric letter.

Re: GM Lock code on dealer invoice?
 

Not directly under the box that says "Key No."?

Looks like "P568" and "S214" to me.

https://mfpclassiccars.com/img/f/s/s...y-k5-4x2-3.jpg

There should be two codes: one for the ignition key and one for the door lock cylinder.

K

Re: GM Lock code on dealer invoice?
 

Here's the build sheet for my '65 GTO, found on top of the fuel tank.

Key codes are shown (but redacted).

K