Expansion Plug For 1967-1974 GMC K25/K2500 Pickup 1968 1969 1970 1971 R157YJ

1967, 1970-1974 GMC K25/K2500 Pickup 4.8L 6 Cyl. 1967 GMC K25/K2500 Pickup 4.6L V8. 1973-1974 GMC K25/K2500 Pickup 7.4L V8. 1969-1974 GMC K25/K2500 Pickup 5.7L V8. 1968-1974 GMC K25/K2500 Pickup 4.1L 6 Cyl.