OER Parts offers a wide selection of Plugs & Wires for your 1987 GMC S15. OER Parts offers 1987 GMC S15 Universal Spark Plug Wires, 1987 GMC S15 OEM Style Spark Plug Wires, 1987 GMC S15 Date Coded Spark Plug Wire Set, 1987 GMC S15 Non-Dated Spark Plug Wire Set, 1987 GMC S15 6 Cylinder Spark Plug Wire Set, 1987 GMC S15 8 Cylinder Spark Plug Wire Set , 1987 GMC S15 Spark Plug Boot, 1987 GMC S15 Spark Plug Wire Puller, Spark Plug Gapper, 1987 GMC S15 Spark Plug Hole Thread Chaser, Accel Shorty Plugs, and1987 GMC S15 E3 Spark Plugs.