Posted by Red on April 18, 2016, 8:03 pm, in reply to "US citizen, mexican resident driving a mexican plated vehicle into the US and Canada"
Now with that said, you may still run into the local county mountie who has nothing better to do than harass you for foreign plates. Good Luck. Many states insist you register your vehicle there within a fairly short time frame, if you reside there! If just passing thru you should be able to win the argument.
Have no clue about Canada's regs. Rojo347