Are panel and Suburban rear bumpers and brackets different than pickup rear bumpers and brackets? I have a bunch of bumpers, can someone help me identify them? Note the two on the right have the same curvature but different brackets. The first and third have different curvature but the same brackets. The only thing I can figure is that panel trucks had a more curved rear bumper or different brackets? Or someone is just screwing with me and throwing random bumpers and brackets into my parts pile ;-)