My 96 was built at the Warren, MI plant. It's been a great truck with very few problems. These days most are made in Saltillo Mexico with a few from St. Louis. I had heard a while ago that all HD were going to be built in Mexico but I'm not sure of that has gone through yet. The thing I like most about US built trucks is that it allows a fellow US worker to buy something I've made. If you've ever seen the Saltillo plant area, you understand that most of the workers there don't have a lot of disposable income to buy things made here in the US.
Just my $0. 02
Just my $0. 02