Bestop 75113-15 PowerBoard Electric Retractable Running Board Set for Chevy/GMC 99-07 Silverado/Sierra 1500/2500/3500 Crew Cab (Classic body style only) Electrically powered running board hides underneath truck when doors are closed, drops down 6 inches, out 2 extra inches to create stair step into the truck 6.25 inch wide board features extruded aluminum with durable powder-coat finish for sure footed, slip-resistant surface Sturdy, cast aluminum alloy arms support up to 600 pounds total load capacity per side; built-in anti-pinch safety stop OEM quality motor in sealed housing with factory-quality wiring harness and weatherproof connectors Complete kit includes two full length boards, OEM quality motor, controller, hardware, wiring harness with weatherproof connectors and LED Light kit