absolutely need a broker these days and three days minimum notice usually - unless it is a known carrier bringing it across for you

I use Simplified Trade Solutions ,go on there website,fill in the form,they will send you a invoice for $35.00 and you get a a ITN number,you do need 3 days wait time,and check to make sure the border is open on the US side for exporting vehicles,the one I cross at Alexandria Bay is only open from M-F 8-4