It sounds to me like something got unplugged. If you can't find it, time head to the dealer.
Unless G2 decided to go back to "the old way" of doing things, I doubt if there's any flasher. Nor would there be a brake switch. It's a position sensor. The BCM takes that input and does the brake switch function. (As well as acting as the flasher).Do the hazards still work in the rear? I would want to rule out bad bulbs. Esp since they are separate bulbs for each. You could be looking a faulty brake light switch and or turn signal flasher. if it is not the bulbs.