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 Fan Components, 1970 GMC C35/C3500 Pickup Blades, 1970 GMC C35/C3500 Pickup Non Date-Coded Fan, 1970 GMC C35/C3500 Pickup Date-Coded Fan, 1970 GMC C35/C3500 Pickup Stainless Steel Flex Fan, and 1970 GMC C35/C3500 Pickup OEM Style Fan Blade.