Hard to explain.. Turn the turbine on at the wall right behind you when you drop into the power place. Zombs will destroy turbine so do it when there's a guy left or something like that. Turn the turbine on then get back on the bus and go to the bank. Throw grenades to open the two vault doors then you can build pack a punch.
Obviously power has to be on to do all this.
Hope this helped!! And the ak47u is on the wall right outside the power room to the other guy who said that in this thread.
Word of advice. Get the knuckles and don't have to really worry about Guns for awhile. I have an earlier post about the knuckles. They are on the roof of the diner. Use bus hatch to get them. Don't use hatch on bus
This post was edited on 11/25 at 3:48 pm