could someone please help me out with the overall differences between a base vibe and a GT model. I know they have different hp ratings, so I am curious as to just how much different they are from each other. are the differences basically just ecm/pcm tuning, or is it more complicated as in different engine components (internal parts, external parts), gearing, etc? I'm pretty sure that from 03-08 all vibes used a 1.8L engine, and the 2.4 wasn't intro'd until 09, is this correct? if so then an 08 base vibe would have the same engine as a GT model, correct?
I appreciate the help and clarification
thanks
West C4