GMC H Series 6 Inch Running Boards. H Series 6 Inch Running Boards by APS®, 1 Pair. The H Series Running board provides an exceptional appearance enhancement for your vehicle. Made with 6061 grade aircraft aluminum for excellent corrosion resistance. Each board is designed with end-to-end non-slip pad coverage for stepping comfort and safety. Solid one-piece structure with a 300 lb weight capacity for each side. Durable matt black finish for abrasion resistance.