Force you to buy a GM car? Hell, they can force you to buy the type of groceries they want, or books (as they do in government schools).
I took a Cadillac Escalade out for a test drive just to drive that sucker before they become extinct.
The salesman sat in the back seat describing the car and all its wonderful options.
The seats were of particular interest. He explained that the seats directed warm air to your butt in the winter and directed cool air to your butt in the summer heat.
I stated the car must be a Republican car.
Looking a bit angry, he asked why I thought it was a Republican car and I explained that if it were a Democratic car, the seats would blow smoke up your ass year-round.
I had to walk back to the dealership but it was worth it...