API 74QK19N Radiator Cap Fits 1975-1978 GMC K15 Radiator Cap -- Standard; 16 lb

For 1978 GMC P25 Radiator Cap 24915GXGZ Standard -- Relief pressure 16 lb

For 1978 GMC P25 Radiator Cap 23595SZMP Standard -- Relief pressure 16 lb

For 1978 GMC P25 Radiator Cap 45997YPDQ Safety Lever -- Relief pressure 16 lb

For 1978 GMC P25 Radiator Cap 57217TFGG Safety Lever -- Relief pressure 16 lb

For 1977-1978 GMC G35 Radiator Cap API 51583HF Radiator Cap -- Standard; 16 lb

For 1977-1978 GMC G25 Radiator Cap API 33323DJ Radiator Cap -- Standard; 16 lb

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