In the following video, Motley Fool industrials analyst Blake Bos discusses the big day for the auto industry coming up tomorrow, as sales numbers for the month of March will be released. Expectations are high, and March could potentially be the best month of sales in over five years. Blake gives some of the critical finer points to watch for in tomorrow's report for investors in Ford (F 0.49%), General Motors (GM 1.06%), and Chrysler via its parent company Fiat (NASDAQOTH: FIATY). He also tells auto industry investors how to interpret these results with a level head.