One Second After, a goofy book that has EMP kill every car except the ones owned by cannibals...
Not sure you read the book very carefully.
The book hardly deserves being described as “goofy.”
You might recall from the book there were a number of gasoline and diesel vehicles repaired to run. Fuel and oil became the issues.
Indeed nuclear EMP might not disable all modern vehicles, particularly highly shielded vehicles like hybrids, but the overall supply chains of western civilization would arguably crumble.