When I bought my ZR2, from a dealer in Washington. It had been made and originally sold and purchased in Canada. I remember my dealer mentioning that they had to make some sort of arrangement, for the warranty. Requiring a GM tech to certify dealer to dealer, that it was on good shape. (it was low miles). And that the warranty would be valued. But would have to be paid out through the Canadian dealer, if it was ever needed. The dealer then, said it was cheaper(easier) for them. To offer a dealer warranty, that was above the GM one. I got a deal I liked. 2 free oil changes a year/ and 100k m bumper to bumper. Up to 100k miles/ 6 years past purchase date.