OER Parts offers a wide selection of Plugs & Wires for your 1976 GMC G25. OER Parts offers 1976 GMC G25 Accel Shorty Spark Plugs, 1976 GMC G25 E3 Spark Plugs, 1976 GMC G25 MSD Spark Plug Wire Set, 1976 GMC G25 Accel Spark Plug Wire Set, 1976 GMC G25 Taylor Thunder Volt Spark Plug Wire Set, 1976 GMC G25 Pertronix Flame Thrower Plug Wire Set, 1976 GMC G25 Cool-It Plug Wire Sleeve Set, 1976 GMC G25 Spark Plug Wire Puller, and 1976 GMC G25 Spark Plug Wire Tester.