what do the letters T21 and D80 mean on the firewall?
25

Asked by digger Feb 29, 2008 at 02:42 PM about the 1969 Pontiac GTO

Question type: General

I have a 69 Judge being restored, it has these "codes" wriiten by hand on the firewall. I am told that is put there during production so the assemblers know what options go on the car. Is that true and if so what options are these?

4 Answers
84,385

littlehorn answered 16 years ago

Have GM Historical Services send you a copy of the build sheet, etc. for your vehicle. Well worth the $50 or so for all the information you will get from them.

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5,135

Rucko answered 12 years ago

yes its looks like a chalk mark right? that was done at the factory for ID purposes.

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5,135

Rucko answered 12 years ago

hey littlehorn you have a web site for this gm historic service? i cant seem to find it.

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