[QUOTE] It's a treaty. It took a lot more than a stroke of the pen.[/QUOTE] OK, the strokes of two pens. The Automotive Products Trade Agreement, commonly known as the Auto Pact or APTA, was an important trade agreement between Canada and the United States. It was signed by Prime Minister Lester B. Pearson and President Lyndon B. Johnson in January of 1965.[1] It removed tariffs on cars, trucks, buses, tires, and automotive parts between the two country's, greatly benefiting the large American car makers. In exchange the big three car makers (General Motors, Ford, and Chrysler) agreed that automobile production in Canada would not fall below 1964 levels and that for every five new cars sold in Canada, three new ones would be made there. [QUOTE] The vast majority of the content from Michigan 3 cars comes from the US.[/QUOTE] Impossible to tell. You can get the percentage of domestic content on any given model. You cannot get the percentage of US content. "Domestic" built cars generally have a domestic content of 60 - 90%. Honda ranges 55 - 70%, Toyota 60 - 85%, Ford 60 - 95%, GM 50 - 90% Chrysler 69 - 85%.