The Rhino-Rack Backbone is a mounting system for your GMC Canyon (Extra Cab) / Chevrolet Colorado (Extra Cab). Connecting to your vehicle's roof via 5 bases on each side, it allows for a Rhino-Rack Pioneer System to be fitted on top.. Rhino-Rack 15-19 Chevrolet Colorado/GMC Canyon Extended Cab 5 Base Backbone Mounting System. Backbone 5 Base Mounting System; For Use w/Pioneer System;. Minimizes Wind Drag And Noise On The Road. Compatible With Rhino-Rack Pioneer Range. Made From Non Corrosive Stainless Steel. Fits Systems PN 42109B/42109BF/45109B. CHEV COLORADO 15+EXTENDED CAB B/BONE. Stylish And Aerodynamically Designed. Backbone 5 Base Mounting System. Complete System Weight 61 lbs.. Drill Bit Includesded. Roof Rack Mount Kit. 2 Hour Installation

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov