OER Parts offers a wide selection of Cooling System Components for your 1970 GMC C35/C3500 Pickup. OER Parts offers 1970 GMC C35/C3500 Pickup Radiators, 1970 GMC C35/C3500 Pickup OE Radiators, 1970 GMC C35/C3500 Pickup OE Style 2 Row Radiators, 1970 GMC C35/C3500 Pickup OE Style 3 Row Radiators, 1970 GMC C35/C3500 Pickup OE Style 4 Row Radiators, and 1970 GMC C35/C3500 Pickup Copper / Brass Radiators.