You might want to phone the border POE where you plan to cross and ask them. I know if it were the other way around, a Canadian driving a US car across the border, Canada doesn't allow it, but I have no idea the rules in the US.
Oh, and just a heads up, you may have difficulty returning to Canada, and may be denied entry based on your extended visitor status currently. Which is another reason the US CBP may not let you take a Canadian car out of the country, because you won't be able to get it back.


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