GMC anticipates their marketing share to go from 3.2 percent to 4 percent by 2019. Marketing share is calculated by taking a period, 3 months for example, calculating total sales of that time period, and dividing it with the same amount of another time period. GM has a good plan to do this too. They plan to push lots of advertisements out during the bowl games. After doing some research myself I found that college football is the third most popular sport in the United States behind NFL and MLB. Also the typical audiences of football and trucks are very similar.