1. Check with RIV (www.riv.ca) to see if the vehicle is admissible.
2. Ensure that you have either cash, or a credit line available to transfer funds. You cannot finance a US car through either a Canadian or US bank. You could finance the car in Canada once it is imported.
3. Find a US dealer with the vehicle you would like.
-remember domestic built = no duty, foriegn =6.1%.
-buy used to save even more
4. Arrange the deal and forward the title to the border 72h's before you plan on bringing it accross.
5. Ensure all paperwork is properly filled out.
6. Ensure that you have the GST and duty (if applicable) ready.
7. Once back in Canada, enjoy the new car...once you pay PST to the liscence bureau...
That's the process. Although there is red tape, forms, and rules to adhere to, it is an easy process. It just takes time and planning. In the average year 200,000 vehicles are either imported or exported between Canada and US, it's a pretty common transaction.