GMs thinking on these is the same as it was for their flex fuel vehicle moves. Work on getting the fuel costs down on the vehicles where it is the highest. It makes sense because these will show the biggest difference with the least engineering because there's a lot more room to hide extra components and extra weight.
Even though I understand what they're doing it's still like giving the fat kid the "most improved" trophy for the soccer season, of course there was a lot of improvement, it couldn't have gotten worse!
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