all cars we sold at our Volvo and Mazda stores had warranty cards/booklets with them for whichever tires we installed....if they were exchanged by us before delivery...
of course that doesnt mean that Pontiac dealers (or all of them ) did the same...
Exactly why it would take a PHS for proof that they were factory option tires. Since there's no code for it this getting to be a long shot......
