The answer might surprise you.

For certain years and models, a Toyota or Honda might have more U.S. content than a Chevy or Dodge. Click here for a graphic on the evolution (and domestic content) of the modern pickup truck (if the graphic seems small – click it and it will expand to fill the screen).

For a more detailed listing of popular models (and a heated discussion by readers) see this article from PickupTrucks.com