Good question. I have not researched it to that level of detail but I'm sure since it is required and regulated that there are some guidelines.Any idea how they mathed up the percentage? Is it by "cost of parts", "number of parts", "weight of parts", and does "part assembled by 3rd party in North America from bits sourced from elsewhere" count as a North American part, an elsewhere part, or some fractional thing?
Just look at the Volt content starting at 40% to 50% for 7 years then jumped to 66% and then changing where it sourced parts a couple times.
Bolt content has been consistent so far.