We purchased a Surco Safari Rack for your 2015 Suburban but because of the factory flush rails, we are having difficulty finding a way to attach it. I have contacted Surco and right now there are no adapters for the 2015 Suburban.
Our only options are to buy $400 +- Yakima or Thule crossbars OR remove the flush rails from the suburban and purchase the Surco roof rails (Picture attached)

But this might require drilling on the roof and all.

Has anyone attached a Surco Safari to their 2015-2020 Suburban before and if so how did you do it?

Or has anyone ever removed the factory flush rails? If so was it hard?