Pulley|w/ Switch|;. Pulley|w/o Switch;. A/C Compressor. New GM R4 Heavy Compressor w/ Clutch. Compressor New /GM R4. Compatible Years: 1977 1978 1979 1980 1981 1982 1983 1984 1985. IMPORTANT: To confirm that this part fits your vehicle, enter your vehicles Year, Make, Model, Trim and Engine in the Compatibility Table.
