Originally Posted by MatthewClement
I suspect this isn't the reason. All of the major American manufacturers have access to high-quality diesel engines in their portfolio. Ford can pick from any of the products made by Ford Europe; GM can raid the Opel/Vauxhall line; and DaimlerChrysler has any number of Mercedes-derived engines it could leverage.
I suspect that it's down to customer choice, negative perception of diesel, and limited availability of diesel fuel in the US.
Some states restrict the sale of diesel autos because of "pollution". Sad, but true.