Verizon has made the bootloader on it's XL unlockable. But there is a solution. Search this thread for Depixel8.
I am in process of trying to run the dePixel8, but it fails. I am following these instructions... http://androiding.how/unlock-bootloader-verizon-pixel-and-pixel-xl/ . My suspicion was because I hadn't toggled that switch in the debugging menu. Is dePixel8 supposed to give me the ability to toggle that switch so I can then root using chainfire's method? if so, what am I missing?