GM Iran produced the Opel Commodore under licence from 1974 until 1976, with "Chevrolet Royale" badging. These models featured 2.5- and 2.8-litre engines. After having developed a reputation for reliability problems, the Royale was replaced on the Iranian production lines by the Buick Skylark ("Buick Iran"), Cadillac Seville and Chevrolet Nova ("Chevrolet Iran"), along with a Chevrolet pick-up truck.[2] The Jeep continued during this time.