Why? Two reasons. First, the Amarok isn't homologated for the US - and apparently can’t be without extensive re-engineering. Second, it's too expensive for the US market. That’s due in part to the so-called chicken tax - a 25% tariff on potato starch, brandy and, importantly, light trucks imposed in 1963 by the US in response to tariffs placed by France and West Germany on US chicken imports.
All this means that, rather than address these issues on an existing model, VW is tabling an all-new pick-up based on its Atlas large SUV and built in the US.
Currently only a concept, the Atlas Tanoak is a very credible future production model.