Your best bet would be to double-check the alignment of the mounting brackets and the arms relative to the frame rails. If you don't see anything odd there, make sure that the U-nuts used for the pinch weld mounts are fully seated or superfluous due to your truck already having U-nuts installed from other running boards. If neither of these things are an issue, give us a call directly at 623-434-5277 for further troubleshooting.