What is a good vin decoder for a 1979 GMC truck?

This link:

http://www.autobaza.pl/ab/en/web/productaa0100

I used it and it worked great.

<< That Link will not work, a 1979 GMC/Chevy will have a 13 digit vin number which will not work at that site.

Try this link > http://www.chuckschevytruckpages.com/7980VIN.html