Vehicle Information Kits
 

I don't know if this has been posted before but I just came across this link to free historic technical documents from GM heritage center. There is tons of infor on all vechicles from 1913 to 2007 free and available. Everything from body specs to engine specs to every available option, their codes, etc, is there. All information is in pdf files and can be zoomed etc.

http://www.gmheritagecenter.com/gm-h...tion-kits.html