<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by JohnAx:
means I can buy the ex-Canada fare and make YVR-LAX (surface) my first leg.</font>
No, as it would change the inital origin point. However, seemingly you can do YYZ-YVR (air) then YVR-LAX (surface) then the rest of the trip.