I wouldn't do it unless you have gussets welded onto the existing bumper and plates welded on the side. The bumper in thin wall metal that cannot support the cantilever load that bikes / racks put onto the structure.
I have seen pictures of the bumper pulled out of the frame and bike parts all over the road. Have not seen it in person but have heard many horror stories.
It was a rainy few days at Algonquin Prov park...tarps kept us dry.
Wayne --Belle River (Windsor), Ontario
2013 Sunset Trail Reserve 25RB..
2015 White Chev Silverado 2500HD 4x4 (6.0 l gasser)
2003 Mountain Star 890SBRX Truck Camper