Years in Production: 81

The longest produced vehicle in the U.S. without interruption is the venerable Chevy Suburban. At 81 years old, it first entered the assembly line in 1935 as a station wagon built on a truck chassis. The Suburban later went on to serve as a military transport vehicle during World War II, and it's spent the last 60 to 70 years as a popular selling extended-cab SUV.

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