You are buying a used in clean condition 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 Chevelle SS El Camino Camaro Impala SS Caprice Belair Chevy 11 Nova SS Pontiac GTO Tempest Grand Prix Lemans Buick Skylark GS Oldsmobile 442 Cutlass Supreme F-85 OEM GM rear window defogger. The motor part number is 5044794 made by the Delco Products of Rochester,New Your USA and is dated 5-77 for May-1977 see photos. The motor does work but makes noise while running,runs slow. the housing part number is 3023590 the fan blade part number is 3023588 no returns selling for parts or repair. thank you for viewing.