So someone in my work complex drives a Pontiac G3. And today for the first time we were parked next to each other. Then as we walked to lunch we were looking at them both. And came to the conclusion that the back ends are interchangeable. The hatch lines and bumper lines match up. I would simply need to replace the taillights and rear bumper. I know for a fact the G5 and Cobalt rear ends could be fully interchanged. Thoughts on this? The G3 looks slightly better.