1981-82: Without US-California, with Heavy Duty Cooling, Identified BB (With Automatic Transmission)
1981-83: Without US-California, with Heavy Duty Cooling, Identified BB (With Automatic Transmission)
1982: Without US-California, without Hilly Terrain, with Heavy Duty Cooling (With Manual Transmission)
1983: With Heavy Duty Cooling, Identified BB (With Manual or Automatic Transmission)