Even if there is no bag re-check, it's not the end of the world. You just take one flight of stairs (or a longer elevator ride if you prefer) to departure and check in with Delta at T2. VS to DL is one of the easiest int'l to domestic transfer at LAX at the moment and 2 hours 40 min is plenty of time for this with GE and checked luggage on the same ticket. If your particular flight to SFO departs form T3 instead of T2, it is still just a short walk away.