API 23TT59G Radiator Cap Fits 1977-1978 GMC K35 Radiator Cap -- Standard; 16 lb

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

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 66131RJHC Standard -- Relief pressure 16 lb

For 1977 GMC K35 Radiator Cap 61968QYHR Safety Lever -- Relief pressure 16 lb

For 1978 GMC K35 Radiator Cap 48774JCBS Safety Lever -- Relief pressure 16 lb

For 1977-1978 GMC P35 Radiator Cap API 83822XB Radiator Cap -- Standard; 16 lb