Well it's that time of the year again - SEMA 2010. As most of you know, SEMA is the largest aftermarket auto show in the country and where the top players in the aftermarket world come out to show off their new parts, accessories and trends. Custom car builders come out by the thousands and show off some of the world’s top automobiles. Media come from all over the globe to cover SEMA and at times dedicate a whole site or magazine to just SEMA coverage. GM has notoriously come…