This is my shot at reading between the lines from a proven source.
GM is making the 3.5L into a 3.7L … it will have 25-30 more ponies.
As for the V8…it has been in testing already. ..it is red… being driven on MI roads. …diesel will be for all of Europe and any other country the S. Africa plant will export too….there is a V8 .. it is the 5.3L (Active Fuel Management)…The H4 was reincarnated the first of the year.