Oklahoma City Assembly was a General Motors automobile factory in Oklahoma City, Oklahoma. Construction on the 4,000,000-square-foot (370,000 m²) plant started in 1974, and it opened in 1979 to produce the newly designed X-body cars for the 1980 model year. After X-body cars came A-body cars (1985-1996) and then the plant began producing the Oldsmobile Cutlass through 1999 and Chevrolet Malibu through 2001. The company spent $700,000,000 to convert the plant from building the Chevrolet Malibu to building the all-new GMT360 SUVs (Chevrolet TrailBlazer, GMC Envoy, Oldsmobile Bravada) in 2001 for the 2002 model year.