Build date

[raregn]

Is there any way of finding out the actual build date of my GN? The door sticker says it was built in December of 86 and I know the "in service" or "warranty start date" was December 27/1986... which coincidentally was my 12th birthday. Which would probably make it an early to mid December build, but I have always wanted to know the cars actual birthday.

 

[MeanBuicks]

It may be on the factory invoice: http://www.gmmediaarchive.com/#