The Yakima Landing Pad 17 installs directly to crossbar mounting points on the flush rails of 2015+ Chevrolet Tahoe and Suburban, GMC Yukon, and Cadillac Escalade models.
Yakima Mighty Mounts 39H are sold as a four pack, adapts older mounts to CoreBar and JetStream bar. SideWinder is not compatible with MM39H and CoreBar/JetStream bar applications.