Trailer

Trailer plates have been issued since 1920. For most years, a single "Trailer" series was applied to all sizes and classes of trailers, from the smallest utility trailers to travel trailers to large freight trailers pulled by semi trucks. Exceptions include:

• Trailer Coach, for travel trailers, issued only in 1939
• A-Trailer, issued to commercial trailers 1958-68
• 5-year Commercial Trailer, 1972-2003
• Apportioned Trailer, 1984-2003

In 2003, all trailers in Michigan were converted to permanent registrations and issued new "Permanent Trailer" plates.