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

For 1977 GMC Sprint Radiator Cap 43872JPJP Safety Lever -- Relief pressure 16 lb

For 1978 GMC C15 Radiator Cap 57133CV Safety Lever -- Relief pressure 16 lb

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

For 1977 GMC K35 Radiator Cap 33287TFZQ Safety Lever -- Relief pressure 16 lb

For 1958 GMC PM151 Radiator Cap 34783XMRR Safety Lever -- Relief pressure 7 lb

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

For 1955 GMC PM250 Radiator Cap 55621DNBJ Safety Lever -- Relief pressure 4 lb