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First step is you have to actually read the warranty. It makes little sense that a warranty would have such a restriction, since a vehicle can break down anywhere and need service that is covered by the warranty.
Second, under the Manguson Moss Warranty Act (federal law) the state attorney general consumer protection unit is the first step in a warranty claim dispute and you would file a complaint with them to ask them to help mediate a resolution of your warranty claim.
Finally, if the attorney general cannot resolve your dispute, your next step is you will have to file suit for breach of contract (warranty) in the small claims court to seek to get coverage for the repairs needed that are covered under the terms of your warranty, which you can do without an attorney. Most times the warranty company will not let it get to this point because it will cost them more to defend your suit than it will to just pay the claim.
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