Ya' know John, if you took 39 automotive engineers working in small groups, committees, and on their own, for 2 years, at the end of that time they will not have produced a plan for a 2 car funeral. The head of the group, the "director," would then justify why one sub-compact driven in reverse is the best option.
The GM diesels in both the 5.7 and the 6.2 were both utter crap. The list of problems on the 5.7 is a bit longer, but only a bit and their performance capabilities were pathetic equaled by the piss poor mileage. In the world of diesels, these two had no redeeming value.