OER Parts offers a wide selection of Cooling System Components for your 1976 GMC C15. OER Parts offers 1976 GMC C15 Fan Components, 1976 GMC C15 Blades, 1976 GMC C15 Clutch, 1976 GMC C15 Hardware, 1976 GMC C15 Shroud Hardware, and 1976 GMC C15 Shrouds.