So, it appears the 2015 Enclave takes a 12" wiper blade for the rear. But for the life of me, I have no idea how to remove the existing blade. The rear blade doesn't move away from the windshield very far. I managed to remove the wiper assembly nut cover to keep from cracking it (saw that in some searches here). But unlike my wife's 2007 Infiniti FX35, it is not a trivial matter to remove the entire assembly by removing the nut.