Originally Posted by SS_Firehawk

C6 was still based off the C5 chassis. The LS2 / LS3 was based off the LS1 motor. There weren't dramatic changes.

C6 to C7 there are a lot. New transmission (updated version of the old, but still very new)
LT1 motor is an all new design, only a handful of things carried over

The frame went from steel to all aluminum.

The electronics in the car also got a serious upgrade, that is where I think the bugs will be found.