Speaker 1: Today in our 2015 GMC Sierra 1500 we'll be having a look at and installing the Westin GenX Oval Nerf Bars with Hoop Steps Part Number 20-3715.Here's what our Nerf Bars look like installed. Our step hoop here, drops down five inches from the main part of the Nerf Bar giving us easy access for a step to get into the vehicle. The step hoop itself, has a two inch diameter tubular… see more >