The F-Series is a series of full-size pickup trucks from Ford Motor Company sold for over five decades. The most popular variant of the F-Series is the F-150. It was the best-selling vehicle in the United States for 23 years and has been the best-selling truck for 33 years, though this does not include combined sales of GM pickup trucks. Analysts estimate that the F-Series alone makes up half of the Ford Motor Company's profits.