For 1987 GMC R1500 Radiator Cap 35768RTGM Standard -- Relief pressure 16 lb

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

For 1987 GMC R1500 Radiator Cap 15919DZDR Safety Lever -- Relief pressure 16 lb

For 1987 GMC R1500 Radiator Cap 79788QNBW Safety Lever -- Relief pressure 16 lb

For 1987 GMC R1500 Radiator Cap 63336BW Radiator Cap -- Pressure Rating 16 psi

For 1987 GMC R1500 Expansion Tank Cap 12287NNDC Standard -- Relief pressure N/A

For 1987 GMC V2500 Radiator Cap 88127XRBD Standard -- Relief pressure 16 lb

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