I think (guess) SIN and Bank Accout are all right, if you update your new address timely. But you will have to apply for your OHIP (Health Card) again at Vancouvor.
-bloor(bloor);
2001-3-6(#30705@0)
OHCP only applys in Ontario. The O is Ontario.
-albxu(Yukon);
2001-3-16{345}(#33816@0)
In BC you can have the medical plan there.
Anyway the SIN does not need to change. The address attached to your SIN will be changed when you file you tax return.
The bank account you may want to close it before you move. It is not convenient to keep a back account from a remote city. You can discuss your situation with your bank manager.