Lately I've been seeing some dually 'burbans around the web. I was talking with my father a little some time back, and he seems convinced that they made a 3500 Suburban at one time. I'm not so sure. I think those are custom aftermarket duallies. Does anyone know if there were, factory made 1 ton suburbans? I guess the next question is, would any of you make that conversion to your 'burban???