Let me start by saying welcome to the bolt. All the information you need on knowing your truck is on this website. Great bunch of people on here can answer any questions you may have,and using the "search" answers alot of questions too.
As for your truck being 6v or 12v depends on what you wanna run check out the electrical section and tech tips. Congrats on the 47. Don't forget to add pics of your new beauty.