Buick Skylarks were assembled in Iran (four-door sedans only) from 1977 to 1981 and again from 1986 to 1988 under the brand name of "Buick Iran". The first generations were known as B1, B2, B3, B4, B5, from 1977 until 1981, and the second and last generation was known as the B2 and B3 from 1986 until 1988. The later models were made after GM released the kits and parts to Iran following the GM's debt to Iran General Motors. These cars were equipped with a 5.7L engine (SB 350 Chevrolet, L engine, 4BBL), and were fully equipped (power door locks, power window, power steering, automatic transmission, a/c, vinyl top). The Cadillac Seville and Chevrolet Nova were manufactured in Iran during the same period. A total of 40,000 GM cars were produced between 1977 and 1987 in Iran. These models were basically the same as those built in the U.S. from 1975 to 1979 (Islamic Revolution).