RickBin - thanks for the background on the Bosch components/common fuel rail/higher op pressures into the 2000s diesels. It all fits. Also glad I don't have the Cail add-ons in this Duramax. I knew about the valve cover matter before buying this 2003 and was thinking that a 2005/06 would be better for me due to that factor, but I knew this owner and the truck and that it had been very well treated - thought that more important. It was a good move - pleased with it.
