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

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

For 1978 GMC P35 Radiator Cap 93139GHTS Standard -- Relief pressure 16 lb

For 1978 GMC P35 Radiator Cap 59423BTCD Standard -- Relief pressure 16 lb

For 1978 GMC P35 Radiator Cap 95872QQNT Safety Lever -- Relief pressure 16 lb

For 1978 GMC P35 Radiator Cap 23739KTXM Safety Lever -- Relief pressure 16 lb

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

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