For 1977 GMC K35 Radiator Cap 99492DZXM Standard -- Relief pressure 16 lb

For 1977 GMC K35 Radiator Cap 55618MQQK Standard -- Relief pressure 16 lb

For 1978 GMC K35 Radiator Cap 57594KDYQ Standard -- Relief pressure 16 lb

For 1978 GMC K35 Radiator Cap 66131RJHC Standard -- Relief pressure 16 lb

For 1977-1978 GMC K35 Radiator Cap API 72441DC Radiator Cap -- Standard; 16 lb

API 76WS14Y Radiator Cap Fits 1977-1978 GMC G25 Radiator Cap -- Standard; 16 lb

API 63QX56P Radiator Cap Fits 1977-1978 GMC G35 Radiator Cap -- Standard; 16 lb

API 85MY39Z Radiator Cap Fits 1977-1978 GMC P35 Radiator Cap -- Standard; 16 lb