Im looking at getting an 85 K10 thats for sale in my area. When I went to look at it with my dad we noticed that the truck only had the pasanger side gas tank, no drivers side tank. I asked my friend about this and he said that his 78 also only has one tank. So my question is are the trucks supose to have two tanks or just the one? Hopefuly some one has the answer and thanks in advance.