OER Parts offers a wide selection of Plugs & Wires for your 1976 GMC C15. OER Parts offers 1976 GMC C15 Accel Shorty Spark Plugs, 1976 GMC C15 E3 Spark Plugs, 1976 GMC C15 MSD Spark Plug Wire Set, 1976 GMC C15 Accel Spark Plug Wire Set, 1976 GMC C15 Taylor Thunder Volt Spark Plug Wire Set, 1976 GMC C15 Pertronix Flame Thrower Plug Wire Set, 1976 GMC C15 Cool-It Plug Wire Sleeve Set, 1976 GMC C15 Spark Plug Wire Puller, and 1976 GMC C15 Spark Plug Wire Tester.