Diesel Cruze Coming?

It seems odd that California would mandate that fleet vehicles have their engines replaced in such a way. It would seem to me cheaper to sell these trucks out of state and purchase new trucks that meet the standard. I'm too lazy to do the research right now, but did anyone challenge this in court? Perhaps another example of why California (the government, not the private sector) is bankrupt?

Buying a banned California diesel truck is risky unless you know for a fact your state will remain exempt indefinitely. Not aware of specific law suits against California but they extended the deadline for some reason.

I wouldn't worry about that. I don't see any state outside of California mandating replacing perfectly good engines that were compliant when they were sold. The other 49 more sane states understand the concepts of grandfathering and planned obsolescence.

Please explain to me why diesels are more complex than say turbocharged Direct injection gasoline engines or hybrids- which the industry is moving towards to meet the next level of fuel economy....

The Ford Powerstroke diesel has been a bad engine for a long time. Want a really good diesel pickup truck engine - get a Cummins (Dodge) or Duramax (Isuzu / GM). A diesel is still much less complex a design b/c it eliminates the need for an electronic ignition system and combustion is controlled mechanically by the reciprocating engine. Today's modern GDI engines actually use a method similar to the common rail direct injection system and frequently use turbo's. Diesel fuel has more energy density than gasoline causing more output per measured volume. It is the same problem e85 has versus gasoline as e85 has 33% less energy density per volume. You want to make a gas engine get similar mileage as a diesel engine - you need to make significant changes to the car or add a supplementary drive system such as a two mode hybrid or parallel system.