For 1978 GMC G35 Radiator Cap 83494HYJW Safety Lever -- Relief pressure 16 lb

For 1978 GMC G35 Radiator Cap 43322XVZR Safety Lever -- Relief pressure 16 lb

For 1978 GMC G35 Radiator Cap 32618NBSN Standard -- Relief pressure 16 lb

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

For 1978 GMC C25 Radiator Cap 71932CJJP Standard -- Relief pressure 16 lb

For 1978 GMC C35 Radiator Cap 13418MGRY Standard -- Relief pressure 16 lb

For 1978 GMC K15 Radiator Cap 13977RNBR Standard -- Relief pressure 16 lb

For 1978 GMC C15 Radiator Cap 39351BPFF Standard -- Relief pressure 16 lb