OER Parts offers a wide selection of Cruise Control Components for your 1976 GMC C15. OER Parts offers 1976 GMC C15 Dash Mounted Switch Cruise Control Unit For Use with Non-Computerized Engines, 1976 GMC C15 Dash Mounted Switch Cruise Control Unit For Use with Computerized Engines, 1976 GMC C15 Column Mounted Cruise Control Unit For Use with Computerized Engines, 1976 GMC C15 Column Mounted Control Cruise Control Unit For Use with Non-Computerized Engines, and 1976 GMC C15 Universal Cruise Control Handle.