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The Rhino-Rack Backbone 4 Base Mounting System is a roof-mounted backbone intended to accept a Rhino-Rack Pioneer system on top. It connects to the vehicle roof via four bases on each side to create a strong mounting foundation and is supplied for 2015–2020 Chevrolet Suburban, Cadillac Escalade and GMC Yukon XL applications to support heavy-duty rooftop gear and accessories.
Rhino-Rack 15-20 Chevrolet Suburban/GMC Yukon 4 Base Backbone Mounting System
