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

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

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

For 1955 GMC PM250 Radiator Cap 74733WNYQ Standard -- Relief pressure 4 lb

For 1987 GMC V2500 Radiator Cap 17464FPKG Standard -- Relief pressure 16 lb

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

For 1977 GMC Sprint Radiator Cap 17272XNBD Standard -- Relief pressure 16 lb

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