Between what years was the transmission built by General Motors used in the full-size, extended length, sport utility vehicle from Chevrolet?
Muncie SM465 transmission: The Muncie SM465 is a heavy-duty, four-speed manual transmission built by General Motors for use in light and medium duty trucks from 1968 to 1991. Muncie SM465 transmission:  The SM465 can be found in Chevrolet and GMC full-size trucks, Blazers, Suburbans, among other models. Chevrolet Suburban: The Chevrolet Suburban is a full-size, extended-length sport utility vehicle from Chevrolet.
1968 to 1991